Answer:
D. Using tools to measure radiation levels in space
Explanation:
You want to identify the activity that is more likely to be the work of a research scientist rather than an engineer.
EngineeringThe task of an engineer is to apply the laws of physics and the properties of materials to the creation of useful artifacts. Such artifacts may include space suits, fireproof materials, or food packaging.
ResearchThe task of a research scientist is to observe the world and the interaction of its parts. The purpose is to come to an understanding that allows prediction of future behavior.
Of the choices offered, the most likely task of a research scientist is ...
using tools to measure radiation levels in space.
How does the fact that telomeres are long stretches of repeated nucleotides lessen the impact that somatic cells don’t have telomerase?
Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.
Telomeres are repetitive sections at the very ends of chromosomes that are present in a variety of eukaryotic species, including humans and unicellular protists. Each round of DNA replication wears down a little portion of the telomeres, which serve as caps to safeguard the interior chromosomal regions.Most somatic (body) cells do not typically have telomerase activity, but certain adult stem cells and germ cells—the cells that produce sperm and eggs—have.Adult germ cells, tumor cells, and fetal tissues all contain telomerase. Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.learn more about telomerase here: https://brainly.com/question/14213408
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A cellular component of the innate defenses includes ________. b cells t cells natural killer cells plasma cells
A cellular component of the innate defenses includes natural killer cells
What is cell?A cell is the simplest, basic and functional units of all living organisms.
There are two types of living organisms based on the numbers of cells they have. These are:
Unicellular organismsMulticellular organismsUnicellular organisms are those organisms consisting of just one cell. That is, they are single-celled organisms. An example is bacteria
Multicellular organisms are organisms made up of two or more cells. Examples include lizard, roundworms, crabs, man.
So therefore, a cellular component of the innate defenses includes natural killer cells
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In a given population if the percentage of homozygous dominant genotype is 36% and the percentage of heterozygous genotype is 48%, what will be the percentage of homozygous recessive genotype
The correct answer to the given question is 16%
What is the percentage of the homozygous recessive genotype?Let x be the percentage of homozygous dominant genotype= 36%
Let y be the percentage of homozygous recessive genotype= 48%
The total population present is 100%
Thus the percentage of Homozygous recessive genotype is
[tex]100 - (x+y)[/tex]
This equals to
[tex]100-(36 + 48)= 16[/tex]
Thus the percentage of the homozygous recessive genotype is 16%
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Which stage of the human immunodeficiency virus (HIV) would a client with a CD4 T cell count of 325 cells/mm3 be classified
Based on the CDC guidelines a person with a CD4+ cell count between 200-400 is regarded as being in the second stage of the HIV infection.
Acquired Immunodeficiency Syndrome
Acquired immunodeficiency syndrome (AIDS) is a condition caused by HIV (human immunodeficiency virus). AIDS is a chronic disorder and can become life-threatening for the infected person. The HIV viruses reproduce inside the host and while doing so they destroy the CD4+ immune cells which reduce the person's ability to fight against other diseases.
CD4+ cell count and AIDS
According to the CDC (U.S. Centers for Disease Control and Prevention), HIV infection is categorized into different stages based on the number of CD4+ cells.
Stage 1: - CD4+ cell count is more than 500 per microlitre. There are no symptoms or AIDS-related conditions. Stage 2: - CD4+ cell count is more than 500 per microlitre. There are no symptoms or AIDS-related conditions.Stage 3: - The CD4+ cell count falls below 200 and AIDS-related symptoms and conditions are present.Learn more about HIV infection here:
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____________________ treatment is the oral administration of radioactive iodine to destroy thyroid cells.
Answer: RAI
Explanation:
The cafeteria served green beans for lunch starting at 11 a.m. By 1 p.m., the remaining green beans have become overcooked and mushy. What pigment is found in the green beans at 1 p.m.
Answer:
chlorophyllin
Explanation:
The green pigment found in green beans is known as chlorophyll. This green pigment turns to bright green in alkaline environments and is known as chlorophyllin
Which molecule is most common in the human body?
A. H2O
. B. N₂
C. H₂
D. CO2
Answer:
A. H2O
Explanation:
The most common molecule in the human body is H2O. H2O makes up about 50-70% of the body's total weight.
Remember, the meaning for H2O is a transparent, colorless, and odorless liquid.
Hope this helps!
The land edge that is affected by marine processes is known generally as the?
The land edge that is affected by marine processes is known generally as the coast
A sea's shore is the area of land there. The coastline is the area of a shoreline where land and water converge. Coastlines are shaped in part by currents, tides, and waves. The ground is eroded or worn away when waves crash upon the shore.Despite making up only around 8% of the land on Earth, coastlines contain about 26% of all biological diversity. This wonderful environment, which is home to many different species of natural communities, is home to seabirds, clams, crabs, starfish, anemones, fish, kelp, and marine mammals, among many other creatures. Though it can also be a tough and challenging environment, since it is frequently altered by erosion and tides as well as pounded by waves and sea spray. Typically, there are three types of coasts: rocky, sandy, and muddy.
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Which synapse(s) are specifically responsible for the habituation of the withdrawal response?
Answer:
Facilitating interneuron to excitatory interneuron
Sensory neuron to inhibitory interneuron
Sensory neuron to excitatory interneuron
Sensory neuron to facilitating interneuron
Sensory neuron to motor neuron
Excitatory interneuron to motor neuron
Sensory neuron to motor neuron are specifically responsible for the habituation of the withdrawal response.
The withdrawal reflex, which is the automatic withholding of a limb from a painful stimulation, is what is known as this automatic reaction.Humans are shielded by this reflex from tissue necrosis brought on by exposure to noxious stimuli like pain or heat. Either the upper or lower limbs may experience it.A somatic reflex, like the withdrawal reflex, and a visceral reflex, an autonomic reflex, differ in that the latter has an efferent branch. The lower motor neuron in the ventral horn of the spinal cord, which immediately projects to a skeletal muscle to produce its contraction, is the output of a somatic reflex.
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A population of 20,000 individuals is surveyed and found to be composed of 9,800 individuals with blond hair and 10,200 with brown hair. The allele for blond hair "b" is recessive to the allele for brown hair "B". Assuming Hardy-Weinberg conditions, the frequency of the Bb genotype in the population is:
A population of 20,000 individuals is surveyed and found to be composed of 9,800 individuals with blond hair and 10,200 with brown hair. The allele for blond hair "b" is recessive to the allele for brown hair "B". Assuming Hardy-Weinberg conditions, the frequency of the Bb genotype in the population is 42%.
What is Hardy Weinberg equilibrium?Hardy Weinberg law states that,
“In a large, random-mating population, the genotype and allele frequencies remain constant in the absence of any evolutionary influences from one to another generation. Influences are inclusive of a choice of mate, natural selection, genetic drift, mutation, sexual selection, gene flow, genetic hitchhiking, founder effect, meiotic drive, population bottleneck, inbreeding and assortative mating.”
Application of Hardy Weinberg equilibrium,
The Hardy-Weinberg equilibrium provides a mathematical criterion of a population that is non-evolving which can be compared to evolving populations. The law offers a prototype which is typically used as a point of origination to study the population genetics of diploid entities, which fulfil the fundamental assumption of random mating, large population, no mutation, migration or selection.Allele frequencies can be detected in the presence of complete dominance when Hardy-Weinberg equilibrium prevails wherein it is not possible to differentiate between two genotypes.To learn more about Hardy Weinberg equilibrium,
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A solution needs to be adjusted at ph 8.0. when you measure the ph of the initial solution the ph meter reads 9.5. what chemical will you add to bring the ph to 8.0?
If the pH is higher than desired, adjust it using a hydrochloric acid solution.
Thus, if you need the solution to read the pH as 8.0 which is lower than 9.5, add HCl solution to it.
pH stands for potential of H+ ions, i.e the amount of Hydrogen ions in a solution.
pH is measured on a scale of 0-14, 7 is the neutral point. pH range below 7 is acidic and higher than 7 is basic.
pH is calculated from the formula-
pH= -log10[H+]
We can also measure the Ph levels by a pH meter. It is used for accuracy, reproducibility and continuous measurement. The values are measured in mV and then converted to pH values.
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Match each type of cause with the source that could shed light on that cause.
records related to the
and export of goods
population records related
to births and deaths
records related to
the use of certain wordspaintings, photographs,
and filmsletters and diaries of
ordinary peoplerecords related to banks
and financial transactions
Economic causes: records related to the and export of goods; records related to banks and financial transactions
Social causes: population records related to births and deaths; records related to the use of certain words
Cultural causes: paintings, photographs, and films; letters and diaries of
ordinary people.
Note that the complete question is found in the attached image.
What are the causes listed?The causes given are economic causes, social causes and cultural causes.
Economic causes deals with things that affect how to satisfy man's needs and wants, Social causes deals how humans relate, and Cultural causes deals with the way of life of a people.
The items and the correct causes are as follows:
Economic causes: records related to the and export of goods; records related to banks and financial transactions
Social causes: population records related to births and deaths; records related to the use of certain words
Cultural causes: paintings, photographs, and films; letters and diaries of
ordinary people.
In conclusion, the causes considered are economic , social and cultural, causes.
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Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. What is the new DNA called?
foreign DNA
restriction DNA
recombinant DNA
transgenic DNA
Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. This new DNA is called recombinant DNA.
What is recombination DNA?
Genetic recombination is the exchange of genes between two DNA molecules to form new combinations of genes. Like mutation, genetic recombination contributes to the genetic diversity of a population, which is the source of evolutionary variation.
Bacteria have two mechanisms of genetic variability: mutation and gene recombination. Gene recombination occurs by three types of mechanisms: transformation, conjugation and transduction. Transformation is the incorporation of free DNA by the bacterial cell.
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Which process is found in both cellular respiration and in the light reactions of photosynthesis?
Answer:
Electron Transport Chain
Explanation:
An electron transport chain is a sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP.
the periodic table contains alot of information in it with the help of that information calculate the number neutrons present in the non metalic elements of the periodic table
The number of neutrons present in the non-metallic elements of the periodic table can be calculated by the formula:
No. of neutrons = Atomic mass - Atomic number
Every atom's nucleus has a neutron, with the exception of hydrogen, which does not. The fact that the particle has no electrical charge—it is neutral—gives it its name.
The elements that gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6, or 7 electrons.
Example : Carbon, Nitrogen, Oxygen , Phosphorous etc.
Let's take an example of non metallic element like Phosphorous
Atomic number = 15
Atomic Mass = 31 u
So, according to the formula
No. of neutrons = 31 - 15 = 16
Hence, the number of neutrons present in the non-metallic elements of the periodic table can be calculated by the formula:
No. of neutrons = Atomic mass - Atomic number
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what is animal tissue ?.
Answer:
animal tissues are made up of animal cell that have been gathered together
Animal tissues may be divided into four categories: epithelium (which lines cavities and covers organs), connective (which makes ligaments and tendons), nervous (which is formed of neurons and transmits electricity), and muscular (which produces smooth and striated muscles).
In a biological sense, the tissue is simply described as an ensemble cast of comparable cells from the same origins that work together to perform a single function. Animal tissues are made up of a collection of cells. The origin, purpose, and structure of these tissues differ. The epithelial, connective, muscular, and nerve tissues are the four major tissues found in an animal's body. Let's take a quick look at each kind of animal tissue.
Types of Animal TissueEpithelial tissue
All internal and exterior organ surfaces are protected by epithelial tissue. A collection of tissues often referred to as epithelium lines every layer and organ in the body. This animal tissue is very permeable because it is crucial for the movement of chemicals between cells and supports osmoregulation. The epithelium is classified into two types: simple epithelium and complex epithelium, depending on how many layers there are. The primary roles of epithelial tissue are absorption, sensing, secretion, and protection. They serve as a barrier to prevent harm and the entry of diseases like viruses, bacteria, etc. Some epithelial cells also absorb nutrients, release chemicals like digestive juices, and stop the body from losing water.
Connective tissue
As its name implies, connective tissue serves to link or divide other bodily tissues or organs. Fibrous connective tissue, which essentially binds bones together, is strong and may be found in places like ligaments. Given that they comprise blood, adipose tissue, bone, and cartilage, connective tissues are really the most prevalent tissues in complex animals. Collagen and elastin are structural proteins that are secreted by all connective tissues, with the exception of blood. Loose connective tissue, dense connective tissue, and specialized connective tissue are some of the several forms of connective tissues.
Muscular tissue
The three categories of this animal tissue are cardiac, smooth, and skeletal. The contraction of skeletal components creates the voluntary kind known as skeletal. Involuntary smooth tissue can be seen in the blood vessel and internal organ walls. The final kind, cardiac muscle, is only present in the heart's walls and is involuntary in nature. It so happens that the body's reactions to shifting situations are under the direction of the neural or nervous tissues. The building blocks of the nervous system are neurons, or excitable cells. It is made up of specialized cells that take in inputs and carry impulses to and from various bodily areas. Processing and information transport are among its capabilities.
What are the products of the electron transport chains within the light reactions?
ATP and NADPH
The light reactions of photosynthesis occur in the thylakoid membranes of the chloroplast. Electron carrier molecules are arranged in electron transport chains that produce ATP and NADPH, which temporarily store chemical energy
What is Electron transport chains in Photosynthesis ?
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation.
It occurs in mitochondria in both cellular respiration and photosynthesis.The primary task of the last stage of cellular respiration, the electron transport chain, is to transfer energy from the electron carriers to even more ATP molecules, the "batteries" which power work within the cellLearn more about Electron transport chain here:
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Select all that apply.
Which of the following are part of the Protista kingdom?
protozoa
eubacteria
plants
fungi
algae
The organism that is part of the Protista kingdom is protozoa. Details about protists can be found below.
What are protists?Protists are any of the eukaryotic unicellular organisms that possess animal and plant like features.
Members of the kingdom protista include the following:
protozoansslime moldssome algaeTherefore, the organism that is part of the Protista kingdom is protozoa.
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Where does the f1 subunit of atp synthase get its energy to catalyze the synthesis of atp?.
The rotation of the Fo subunit leads to rotation of the F1 subunit, which can then catalyze ATP synthesis
which can then catalyse the synthesis of ATP. Kinetic energy from the flow of protons is converted to the kinetic energy of rotation of the Fo subunit.
What is ATP synthase ?The hydrophilic F1 region of the ATP synthase is in charge of ATP hydrolysis. Invading the mitochondrial matrix space is the F1 unit.
A hexamer with six binding sites is formed by the subunits and. Three of these bind ADP while being catalytically inactive.Synthases of ATP. An enzyme that uses energy from a proton gradient or another source to catalyse the phosphorylation of ADP with inorganic phosphate to produce ATPLearn more about ATP synthase here:
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in humans, advanced aging mimics many symptoms of mitochondrial dysfunction. This provides support for:
The mitochondrial dysfunction has emerged as one of the key hallmarks aging process and is linked to the development of numerous age-related pathologies including metabolic syndrome, neurodegenerative disorders, cardiovascular diseases and cancer.
Mitochondrial dysfunctionChronic (long-term), hereditary, and frequently inherited ailments known as mitochondrial illnesses take place when mitochondria are unable to create enough energy for the body to function normally. When a condition is inherited, it indicates that parents have passed it on to their offspring. In addition to developing at any age, mitochondrial illnesses can be present at birth.
Affected organs by mitochondrial illnesses include the brain, nerves, muscles, kidneys, heart, liver, eyes, ears, and pancreas. They can also affect the cells of the kidneys. When the mitochondria don't perform as well as they should as a result of another illness or condition, mitochondrial dysfunction arises.
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respirations are documented as 14, reg, normal. Reg is referring to what aspect of her respirations
Respirations rate is 12-18 breaths per minute.
RespirationsA person's breathing and the entry and exit of air from the lungs are referred to as respiration. The respiratory system eliminates waste products like carbon dioxide and serves to keep the acid-base balance in the body by supplying oxygen to bodily tissues for cellular respiration. Expiration, on the other hand, is the process through which air leaves the lungs. Inspiration causes air to enter the lungs. When measuring respiratory rate, a respiratory cycle is referred to as one breath or one inspiration followed by one exhalation. Rate, rhythm, and quality of respiration are all evaluated. An individual usually breathes quietly and with ease.
respirations are documented as 14, reg, normal. Reg is referring to what aspect of her respirations
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n most muscles, when a muscle contracts and its fibers shorten, the origin moves toward the insertion. True False
In most muscles, when a muscle contracts and its fibers shorten, the origin moves towards the insertion. This is true. Muscle contraction is the shortening, tightening and lengthening of muscles due to some physical activity.
During muscle contraction, one end of the muscle moves while the other end is fixed in its position. The point of attachment that moves during any action is called insertion while the point of attachment that doesn't move during action is called origin. The origin has more muscle mass and is less movable whereas the insertion has less muscle mass and is more flexible and movable. Muscle contraction occurs in the following sequence :
formation of cross bridgepower stroke dissociation of cross bridgecocking of myosinThe muscle unites the immobile bone at the origin which is fixed whereas the muscle unites the moving bone at the insertion. So whenever the muscle contracts and its fibers shorten the origin moves towards the insertion.
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Which body composition measuring system uses the volume of a controlled chamber compared to body volume to determine bodyfat percentage? Body mass index (BMI) Skinfold measurements Bioelectrical impedance (BI) Air displacement plethysmography (ADP)
Air displacement plethysmography (ADP) measures the volume of a controlled chamber compared to body volume to determine body fat percentage.
What is Air displacement plethysmography (ADP)?A two-component model called air displacement plethysmography (ADP) measures mass and volume, allowing for an assessment of body density (Db). This allows for the estimate of fat and fat-free mass using body density, which is calculated by dividing mass by volume (FFM).
With air-displacement plethysmography, an object's volume is indirectly determined by calculating how much air it displaces inside a sealed chamber (plethysmograph). Therefore, a patient is placed inside the chamber and their body volume is measured by how much air they can move while sitting within.
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Meiosis is the process by which: Group of answer choices gametes are produced growth and replacement of cells occur in multicellular animals single cell organisms reproduce all of these
Meiosis is the process by which gametes are produced.
What is meiosis?Meiosis is a cell division in which the parent cell divides to produce four daughter cells, each containing half the number of chromosomes.It is also known as reductional division.It is crucial for reproduction because meiosis is the sole way for germ cells to form sperm or eggs.In sexually reproducing organisms, meiosis ensures the generation of the haploid phase, whereas fertilization restores the diploid phase.Meiosis is a process that occurs during gametogenesis in both plants and animals which results in the production of haploid gametes.To learn more about meiosis,
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Approximately half of the solid waste produced in the united states is____waste, which is generally recycled into the____on the farms where it is produced.
Approximately half of the solid waste produced in the united states is agricultural or farm waste, which is generally recycled into the soil, ground, earth, or fields on the farms where it is produced.
Each American creates more than 1,700 pounds of it annually, totaling 239 million tons. China and India produce more waste, or not? Yes, they together bear responsibility for 27% of the world's rubbish.Municipal solid waste (MSW) generation in 2018 totaled 292.4 million short tons (U.S. short tons, unless otherwise noted), or 4.9 pounds per person each day. About 69 million tons of the MSW produced were recycled, and 25 million tons were composted.Only 94.2 million tons of the 267.8 million tons of municipal solid trash that Americans produced in 2017 were recycled or composted, according to the EPA.learn more about solid waste here: https://brainly.com/question/19152477
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The cytoplasmic membranes of ________ contain unbranched phospholipids and proteins.
The cytoplasmic membranes of both bacteria and eukaryotic cell contain unbranched phospholipids and proteins. A cell membrane is a phospholipid bilayer that encloses and protects the cytoplasm in practically all cells. In addition to lipids, proteins also make up biological membranes; the presence of these proteins distinguishes one membrane from another.
Phospholipids are restricted to the inner leaflet of the bacterial membrane and are not present in the outer membrane. Lipopolysaccharide makes up the majority of the glycolipids in the outer leaflet of the OM (LPS).
The plasma membrane is the double layer of lipids that divides the inside of the cell from the external environment and is present in eukaryotic cells. Phospholipids, a specialised lipid type, make up most of this double layer, where two hydrophobic fatty acid tails and a hydrophilic phosphate head make up a phospholipid.
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A Review of Global Prevalence and Economic Impacts of Infectious Bovine Keratoconjunctivitis AND doi
The consequences of infectious bovine keratoconjunctivitis (IBK) on the economy call for more research into how Moraxella bovis colonizes and lives on the corneal surface.
What is the review of Global Prevalence and Economic Impacts of Infectious Bovine Keratoconjunctivitis and doi?M. bovis strains that are virulent generate hemolysin and have unique plasmid profiles from nonvirulent strains. IBK prevalence is impacted by interactions between the host, environment, vector, season, and concomitant infections.
The illness process could be accelerated or made worse by Mycoplasma sp. or the infectious bovine rhino tracheitis virus. IBK symptoms can range from a minor case of conjunctivitis to severe ulceration, corneal perforation, and blindness. Economical factors, planned animal usage, and administration practicality all influence how IBK is treated.
The goal of antibiotic therapy is to increase medication concentrations in tears to levels that are at or above the minimum inhibitory concentration for extended periods of time. IBK is currently a disease that cannot be prevented. Vector control must be rigorously implemented and affected animals must be removed from the herd. Identification and exclusion of carrier animals from the herd are required.
Due to pili antigen cross reactivity, fluctuating strains, and unmanaged environmental conditions, vaccination efforts have been unsuccessful. Recent studies have revealed that M. bovis may use siderophores and iron-repressible outer membrane proteins to exploit host iron sources for growth. Understanding the typical defense mechanisms of the bovine eye may help develop innovative methods for boosting the immune response against M. bovis.
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Microtearing that occurs during which muscle action is responsible for delayed onset muscle soreness (DOMS)
micro tearing that occurs during which muscle action is responsible for delayed onset muscle soreness (DOMS) is an eccentric. Option A
What is DOMS?The full meaning of the abbreviation is delayed onset muscle soreness.
Delayed-onset muscle soreness (DOMS) can be defined as a muscle pain that begins after much exercise.
It normally starts a day or two after a workout and is not not felt during the exercise.
The pain felt during or immediately after a workout is termed acute muscle soreness.
Any exercise that leads to the delayed onset muscle soreness is one that leads to an eccentric muscle contraction
Eccentric contraction is defined as the muscle's contraction to bear load against the earth's gravity while being lifted.
Thus, micro tearing that occurs during which muscle action is responsible for delayed onset muscle soreness (DOMS) is an eccentric. Option A
The complete question;
Microtearing that occurs during which muscle action is responsible for delayed onset muscle soreness (DOMS)?
a. Eccentric
b. Concentric
c. Isometric
d. Isotonic
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Contests between members of the same species or even the same group are referred to as:_____.
Contests between members of the same species or even the same group are referred to as secondary succession
Secondary inheritance occurs when a climax or inter-community failure is affected. This will restart the inheritance cycle, but it will not return to the square. The soil and nutrients are still there.
Primary transitions occur in unprecedented environments or sparse habitats. Secondary inheritance occurs in previously inhabited but disturbed areas such as wildfires. The newly created volcanic island is made up of unprecedented, soilless rocks.
A typical example of secondary inheritance occurs in oak and hickory forests logged by wildfires. Wildfires burn most vegetation and kill animals that cannot escape the area. But those nutrients are returned to the soil in the form of As
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Suppose a mouse develops loss of sodium pump activity in the thick ascending limb of the loop of henle in all of the nephrons in both kidneys. What problem would you expect this mouse to have?.
A tendency to drink more water than normal accompanied by excretion of dilute urine.
What happens in the thick ascending limb of loop of Henle?Sodium chloride (NaCl) is actively reabsorbed by the thick ascending limb of loop of Henle, but water cannot pass through it. A lumen-to-interstitium osmotic gradient and medullary interstitial hypertonicity are consequently produced as a result of this segment's increase in the interstitial fluid's osmolality.
If the sodium pump loses its activity then sodium is not reabsorbed in the thick ascending limb of loop of Henle. The concentration of sodium chloride increases in the interstitial fluid and hence more water will be needed to counter the effect and more dilute urine will be excreted out.
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