What percentage of adolescent boys are suffering from anorexia?

Answer:

the genes tend to "stick together" during meiosis

Explanation:

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Amino acids are the building blocks of proteins. Each protein is composed of a unique combination of amino acids, and the composition of these amino acids affects the protein's structure, stability, and function.

The properties of the amino acids, such as the hydrophobicity or polarity of their side chains, determine the overall shape and charge of the protein, which in turn affects the way the protein interacts with other molecules and its function in the cell. For example, some amino acids possess acidic or basic side chains, which allow the protein to act as an enzyme, binding to and catalyzing chemical reactions.

Other amino acids are hydrophobic and can help the protein fold into a specific structure that is necessary for its function. In this way, the properties of the amino acids determine the structure and function of proteins.

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Precipitation that can carry pollutants into aquatic ecosystems is called runoff.

Aquatic ecosystems are ecological communities that exist within bodies of water such as oceans, lakes, rivers, and wetlands. They are complex systems that are shaped by a variety of physical, chemical, and biological factors. These factors include water temperature, dissolved oxygen levels, nutrient availability, water currents, and the interactions between different species of plants and animals.

Aquatic ecosystems can be divided into two main types: marine and freshwater. Marine ecosystems are found in saltwater bodies such as oceans and estuaries, while freshwater ecosystems exist in bodies of freshwater such as rivers, lakes, and wetlands. These ecosystems are home to a diverse range of aquatic plants and animals, including algae, plankton, fish, and mammals.

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The ATP produced in photosynthesis is most closely associated with the light-dependent reactions.

These reactions occur in the thylakoid membrane of the chloroplast and are powered by light energy. During the light-dependent reactions, pigments such as chlorophyll absorb light energy, which is then converted into chemical energy. This energy is used to create a proton gradient across the thylakoid membrane, which drives the production of ATP through a process called photophosphorylation.

In addition to ATP, the light-dependent reactions also produce NADPH, which is used to provide reducing power for the subsequent light-independent reactions. Therefore, the ATP produced in photosynthesis is closely associated with the light-dependent reactions, which are responsible for converting light energy into chemical energy in the form of ATP and NADPH.

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The given statement is False. For any given species, cells in metaphase II of meiosis would contain half of the genetic material than cells in metaphase of mitosis.

Mitosis is a process in which a single cell divides into two genetically identical daughter cells. During mitosis, the cell nucleus and cytoplasm both divide to form two daughter cells. Mitosis is responsible for asexual reproduction in unicellular organisms and for the growth and repair of tissues in multicellular organisms.

Meiosis is a process in which a diploid cell divides into four haploid daughter cells, each with half the number of chromosomes as the parent cell. Meiosis produces gametes for sexual reproduction. Each chromosome has two sister chromatids and two homologous chromosomes.

Metaphase is the stage of mitosis in which the chromosomes align along the metaphase plate. The spindle fibers attach to the kinetochores of the chromosomes, and the chromosomes are pulled to the centre of the cell.

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The correct order of the events is:The scientist formulates a research question.The scientist generates a hypothesis to explain the observation.

A hypothesis is a tentative explanation or prediction for an observed phenomenon that can be tested through further investigation. It is an essential part of the scientific method, which is a systematic approach to acquiring knowledge and understanding the natural world.

A hypothesis is typically based on prior knowledge, observations, or existing theories, and it is formulated as a statement that can be tested through experimentation or observation. A hypothesis should be clear, specific, and testable, meaning that it can be supported or refuted by empirical evidence.

In the scientific method, a hypothesis is proposed as an explanation for an observed phenomenon, and then a research design is created to test the hypothesis through experimentation or observation. The results of the experiment or observation can either support or refute the hypothesis. If the hypothesis is supported by the evidence, it can become a theory or a scientific.

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When ATP hydrolysis is inhibited, facilitated diffusion of ions through membrane channel proteins would likely also be inhibited.

Facilitated diffusion- Facilitated diffusion is a process that assists the passive transport of ions or molecules across the cell membrane with the assistance of membrane proteins, called channel proteins or carrier proteins. It is also a passive form of transport that does not require energy consumption by the cell. It is because the ions or molecules go down their concentration gradient. Nevertheless, if ATP hydrolysis is prevented, it would result in the blockage of facilitated diffusion of ions through membrane channel proteins. Since, it is a passive process that necessitates energy, the blockage of ATP hydrolysis stops the process.

ATP hydrolysis- ATP hydrolysis is a process that breaks down ATP molecules to produce ADP molecules, inorganic phosphate, and energy. Hydrolysis reactions break the high-energy bonds of ATP molecules, liberating energy that the cells can utilize to perform work. ATP hydrolysis is an exergonic reaction that occurs naturally in cells, and it is required for the functioning of cells. The cells generate ATP through metabolic processes like glycolysis and the Krebs cycle, and then ATP is utilized to carry out work.

ATP hydrolysis is vital to living organisms since ATP is a vital energy source for cells. As a result, ATP hydrolysis must be kept up for cells to carry out their function effectively. As a result, the blockage of ATP hydrolysis results in the cessation of cellular processes that necessitate ATP consumption.

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Inulin and creatinine are valid glomerular markers for estimating GFR because Inulin is a fructose polysaccharide obtained from the tubers and roots of various plants it is usually excreted by the kidneys as a product of glucose metabolism, and it is not reabsorbed or secreted by the renal tubules, making it a perfect substance for measuring GFR.

GFR stands for Glomerular Filtration Rate, and it is the volume of the fluid that passes through the kidney's glomerular filtration membrane in one minute. GFR is regarded as the gold standard for evaluating kidney function.

Creatinine is a waste product generated by muscle metabolism that is excreted from the body via urine. Because it is produced at a relatively constant rate, creatinine is an excellent endogenous marker for estimating GFR.

Because creatinine is a metabolic waste product that is constantly produced, it is used to determine the effectiveness of the glomerular filtration process.

Creatinine is released by muscle metabolism at a relatively steady rate, making it an excellent marker for measuring GFR.

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The consequences of meiotic recombination are i and iii- increased genetic diversity and the exchange of parts of homologous chromosomes.

Meiotic recombination is the process of the swapping of genetic material during the division of reproductive cells, leading to the formation of four genetically diverse haploid cells from a single cell. This recombination aids in generating genetic diversity in the offspring, which results from the blending of parental chromosomes. Meiosis is the process by which cells reproduce, resulting in four genetically unique daughter cells. The process of meiosis, however, includes two divisions, during which the homologous chromosomes from the mother and father combine to create genetic diversity.

Meiotic recombination has the following consequences: i. Increased genetic diversity: Meiotic recombination leads to the formation of four genetically distinct haploid cells from a single diploid cell. Therefore, it is the principal source of genetic diversity in organisms. ii. Exchange of parts of homologous chromosomes: This occurs when the genetic material of two chromosomes is mixed, which occurs when the DNA sequence is broken and then joined back together in a different location on the same chromosome or on a non-sister chromatid. iii. Stabilization of chromosomes at the metaphase plate: Chromosomes are properly organized and aligned along the metaphase plate after meiotic recombination has occurred.

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The possible colors of the offspring produced by a cross between two black dogs of unknown genotypes will be black and brown dogs.

The possible colors of offspring of two black dogs of unknown genotype are black or brown. The reason for this is that both parents have the same genotype of Bb, which is heterozygous. As a result, they have a 50-50 % chance of producing black or brown offspring.

Black color is dominant over brown color, so black will always be the more likely outcome. However, the chances of brown offspring are not negligible, as they have a 25% chance of inheriting the recessive b allele from both parents, resulting in a homozygous recessive genotype.

A genotype is an individual's genetic composition. It's the entire set of genes that an individual possesses, including dominant and recessive alleles, that code for a particular trait. An individual's genotype determines its phenotype, or the physical and visible characteristics that result from its genetic composition.

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Digestion is the process by which complex food molecules are broken down into simpler molecules that can be absorbed and used by the body for energy, growth, and repair.

Digestion begins in the mouth with the mechanical and chemical breakdown of food by chewing and the action of enzymes in saliva. From there, food passes through the esophagus, stomach, and small intestine, where enzymes and digestive juices continue to break down nutrients such as carbohydrates, proteins, and fats into smaller molecules such as glucose, amino acids, and fatty acids. These smaller molecules are then absorbed into the bloodstream and transported to cells throughout the body, where they are used for various metabolic processes.

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The first part of the pulmonary circuit is/are the pulmonary arteries and the last part of the pulmonary circuit is/are the pulmonary veins. Blood from the pulmonary arteries goes to the right lung first.

The pulmonary circuit is the portion of the circulatory system that transports blood between the heart and the lungs. This circuit starts at the right ventricle of the heart and ends at the left atrium. The first part of the pulmonary circuit is the pulmonary arteries, and the last part of the pulmonary circuit is the pulmonary veins. The pulmonary arteries are the only arteries in the body that carry deoxygenated blood. The pulmonary veins, on the other hand, are the only veins that carry oxygenated blood.

In general, the pulmonary circuit works in the following order: Deoxygenated blood from the body enters the right atrium of the heart, where it is sent to the right ventricle. The right ventricle then pumps blood through the pulmonary arteries to the lungs, where it is oxygenated. The newly oxygenated blood is carried by the pulmonary veins to the left atrium of the heart, where it is pumped into the left ventricle. The left ventricle then pumps oxygenated blood through the aorta and into the rest of the body.

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The lipid that is produced by the body and is a component of every cell membrane is known as phospholipid.

A hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail make up phospholipids. Phospholipids can create a double layer, or bilayer, that serves as a barrier between the cell and its surroundings according to their characteristics. The hydrophobic tails interact with each other and the water whereas the hydrophilic heads engage with the water and face inward. Cells are able to preserve their shape and structure because to this structure, which also aids in controlling the flow of chemicals into and out of the cell.

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The three daughters of the same parents are likely to be different. Scientific fact that supports this answer is the law of independent assortment of genes.

Law of independent assortment is a basic principle of genetics that states that during formation of gametes, alleles for one gene segregate independently of the alleles for another gene. This means that traits controlled by different genes are inherited independently of each other, and combination of traits inherited by offspring is a matter of chance.

As each parent contributes half of their genetic material to their offspring, there is a high degree of genetic variability in offspring. This genetic variability is further increased by independent assortment of genes during meiosis, which results in production of unique combinations of genetic material in each offspring. As a result, even siblings who have  same parents are likely to be genetically distinct and have different physical traits, including the physical appearance.

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Out of the given arrangements of endocrine cells, the one that does not allow for maximum contact with blood capillaries is "ducts".

Endocrine cells are those that secrete hormones into the bloodstream. Out of the given arrangements of endocrine cells, ducts is the one that does not allow for maximum contact with blood capillaries. Ducts are not typically involved in endocrine secretion, but rather in exocrine secretion, which involves the transport of substances such as enzymes and mucus from glands to the surface of an organ or tissue.

Endocrine cells that secrete hormones are typically arranged in cords, clusters, or branching networks, which allow for maximum contact with blood capillaries. This arrangement ensures that the hormones are efficiently transported into the bloodstream and carried throughout the body to their target cells.

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Without being aware of chromosomes, properly identify hybrids containing chromosomes from more than two plant kinds by comparing features between generations.

Intervarietal hybridization is the process of crossing two distinct types. Crossing between two species of the same genus is known as interspecific hybridisation.

Hybrids can exhibit hybrid vigour, occasionally developing larger or taller than either parent, and they are not necessarily intermediates between their parents (as in the case of blending inheritance). In animal and plant breeding, when there is interest in the individual parentage, the concept of a hybrid is interpreted differently.

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This pattern of gametes suggests that a nondisjunction event occurred during meiosis, where a pair of homologous chromosomes or sister chromatids failed to separate properly. Let's consider each hypothesis in turn:

a. The sister chromatids did not separate in meiosis I: This hypothesis does not support the observed pattern of gametes, as sister chromatids remain attached in meiosis II, not meiosis I. Therefore, this hypothesis is not applicable.

b. The homologous chromosomes did not separate in meiosis II: This hypothesis does not explain the presence of gametes with an abnormal number of chromosomes, as meiosis II separates sister chromatids. Homologous chromosomes were already separated in meiosis I. Therefore, this hypothesis is not applicable.

c. The homologous chromosomes did not separate properly in meiosis I: This hypothesis could explain the observed pattern of gametes, as a pair of homologous chromosomes could fail to separate in meiosis I, resulting in two daughter cells with an extra chromosome and two with a missing chromosome. This would lead to gametes with an abnormal number of chromosomes.

d. The sister chromatids did not separate properly in meiosis II: This hypothesis does not explain the presence of gametes with an abnormal number of chromosomes, as sister chromatids were already separated in meiosis I. Therefore, this hypothesis is not applicable.

e. The sister chromatids did separate properly in meiosis II: This hypothesis does not support the observed pattern of gametes, as it implies that sister chromatids were not properly separated, which would result in gametes with identical chromosome numbers. However, the observed gametes have different numbers of chromosomes, indicating that they have undergone a nondisjunction event. Therefore, this hypothesis is not applicable.

Based on the observed pattern of gametes, the most likely hypothesis is that homologous chromosomes did not separate properly in meiosis I.

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Answer:

Homologous structures are similar in structure but differ in function and are inherited from a common ancestor. Vestigial structures, on the other hand, are remnants of structures that were functional in ancestral species but are no longer needed in the current species.

Explanation:

Homologous structures are anatomical features that are similar in structure but differ in function. They are inherited from a common ancestor but may have evolved to serve different purposes in different species. For example, the forelimbs of mammals such as humans, bats, whales, and horses all have the same basic structure, with a humerus, radius, ulna, carpals, metacarpals, and phalanges, despite being adapted for different uses.

Vestigial structures, on the other hand, are anatomical features that have lost their original function over time. They are remnants of structures that were functional in ancestral species but are no longer needed in the current species. For example, the human appendix is a vestigial structure that was likely used for digesting cellulose in ancestral species but now has no known function in humans.

The structure that synthesizes MHC class I molecules is the Rough ER (Endoplasmic Reticulum). Therefore, the correct answer is option c. Rough ER.

Major Histocompatibility Complex (MHC) class I molecules are transmembrane proteins that are synthesized in the endoplasmic reticulum (ER) and are involved in antigen presentation to cytotoxic T lymphocytes. MHC class I molecules are essential components of the immune system that play a critical role in immune responses to pathogenic infections and tumor development. The rough endoplasmic reticulum (RER) is a type of endoplasmic reticulum (ER) with attached ribosomes that synthesize proteins destined for insertion into the ER, plasma membrane, or secretion from the cell. The RER plays an important role in the synthesis and folding of secretory and membrane proteins, as well as in the modification, quality control, and transport of newly synthesized proteins. MHC class I molecules are synthesized in the RER and transported to the cell surface via the secretory pathway, where they present peptides derived from intracellular pathogens or self-antigens to CD8+ T cells.

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The four proteins is individually injected into the cytosol of eukaryotic cells, the protein that will be able to localize correctly is prc (cytosol protein), and the proteins that will not localize correctly are prm, prn, and the secreted protein,

Protein trafficking is the process by which proteins are transported to their correct locations within cells or organisms. It is a crucial aspect of the functioning of cells and organisms as it ensures that proteins are in the right places at the right time to carry out their functions.

GFP (Green Fluorescent Protein) is a protein that is commonly used in molecular biology research as a marker to visualize proteins and other molecules. It is a naturally occurring protein that emits green light when exposed to UV light, making it a useful tool for visualizing the location of proteins and other molecules within cells.

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answer:

IV. animal predation.

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The best explanation of the processes illustrated in Figure 1 is that the introns are removed from the pre-rRNA, and the mature rRNA molecules are joined and then translated to produce the protein portion of the ribosome.

In other words, sections of the pre-rRNA are removed and the mature rRNA molecules are available to combine with proteins to form the ribosomal subunits, which then get translated to create the proteins that make up the ribosomal subunits.

The introns are also known as intervening sequences since they are not observed in mature RNA. rRNA or the ribosomal RNA plays an important structural as well as catalytic role during the process of translation.

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The two examples such as nicotine and opium are used as medicines and narcotic from the tobacco plant are used commercially.

Secondary compounds from plants that have proven useful for humans are opium from the opium poppy that used cough medicines and nicotine from the tobacco plant, which is a narcotic and stimulant that has been commercially very important over the last several centuries.

Plants are a great source of secondary compounds, including alkaloids, flavonoids, and terpenoids, which are often used for medicinal purposes. These compounds can act as a protection mechanism for the plant, aiding in the protection against herbivores or diseases, but they also have useful effects on humans.

Nicotine, an alkaloid found in tobacco plants, is one of the most well-known secondary compounds. It has been used for centuries as a narcotic and stimulant. It was initially used as a medicine in the 16th century to cure ailments such as headaches and stomachaches, and it was later used for its addictive qualities in cigarettes.

Opium, another alkaloid, is extracted from the opium poppy plant. It has been used for centuries as a painkiller and cough suppressant. It is one of the most valuable natural substances in the pharmaceutical industry, and it has been used to create powerful painkillers such as morphine and codeine.

The secondary compounds found in plants have numerous other applications, including antimicrobial, antifungal, and anticancer agents. They can also be used in perfumes, dyes, and insecticides.

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The main psychoactive ingredient in Psilocybe cubensis is psilocybin.

Psilocybe cubensis, also known as the magic mushroom, is a species of psychoactive mushroom. It is one of the most commonly used psychedelics, along with LSD and mescaline. Psilocybe cubensis contains the psychoactive compounds psilocybin and psilocin, which cause a change in perception, thought, and mood when consumed. They are part of the tryptamine family of psychedelics.

Because of its hallucinogenic effects, which can include changed perceptions of reality, visual and aural hallucinations, and dramatic changes in mood and cognitive patterns, it is a popular recreational drug.

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Researchers picked habanero peppers at different time points after the peppers matured and measured the concentrations of the flavor molecules. The following statements about these data is true A) Habenero peppers are the least hot when picked 80 days after maturity

Dihydrocapsaicin and capsaicin are two major pungent and spicy components of peppers that contribute to the pepper's flavor.In the peppers, the concentration of these flavor molecules is determined. Dihydrocapsaicin concentration is higher in the seeds of the habenero pepper thahttps://brainly.com/question/921294 in the flesh.

Capsaicin is always present in higher concentrations than dihydrocapsaicin, which is true. However, dihydrocapsaicin concentrations do not rise and fall more rapidly than capsaicin concentrations, which contradicts the data.

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There are five chemically distinct classes of human immunoglobulins: IgA, IgD, IgE, IgG, and IgM. IgA is the most abundant and makes up 10-15% of serum immunoglobulins.

IgD is present in very small amounts and is found on the surface of B cells. IgE is involved in allergic reactions and is found in very small concentrations in the serum. IgG is the most abundant serum immunoglobulin and makes up 75-80% of serum immunoglobulins. IgM is the largest immunoglobulin and is found in very low concentrations in serum, but is important in the early stages of the immune response. Each class of immunoglobulin is made up of different subtypes which may have different functions, but all have the same basic structure. Immunoglobulins can recognize foreign antigens, form a complex with them, and trigger an immune response. They also have an important role in defending the body against infection, and in controlling inflammatory responses.

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Calvin cycle or the light-independent reactions are responsible for carbon fixation, taking inorganic carbon dioxide gas and converting it into organic molecules that the plant can use as energy.  

The correct options are a. Plants would not produce oxygen. b. G3P would be produced in much smaller quantities. c. NADPH production would decrease while ATP production increased.

In photosynthesis, the light-dependent reactions happen in the thylakoid membranes of the chloroplasts in a plant cell. These reactions create the energy currency for the plant cell in the form of ATP and NADPH. They additionally create oxygen as a byproduct.

The ATP and NADPH made by the light-dependent reactions at that point power the light-independent reactions. They occur in the stroma of the chloroplasts of the plant cells.

The light-independent reactions use ATP and NADPH that were created by the light-dependent reactions to power the conversion of CO2 into G3P (glyceraldehyde 3-phosphate), a carbohydrate molecule.

If plants were no longer able to perform the light reactions and they could only utilize the Calvin cycle, the following would be true: Plants would not produce oxygen because oxygen is produced as a byproduct of the light-dependent reactions, which are no longer occurring.G3P would be produced in much smaller quantities.

This is because ATP and NADPH that were created by the light-dependent reactions are required for the conversion of CO2 into G3P. Without the light-dependent reactions, the amount of G3P produced would decrease significantly. NADPH production would decrease while ATP production increased.

ATP would be produced through the cyclic electron transport pathway that makes use of Photosystem I only. It will produce ATP but not NADPH. As a result, the amount of ATP created would increase, while the amount of NADPH would decrease.G3P would be produced in much greater quantities.

This is incorrect, because, as mentioned above, the amount of G3P produced would actually decrease because the light-dependent reactions, which create ATP and NADPH, are not happening.

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The phase of mitosis during which chromosomes line up on the equator of the cell is metaphase. Therefore the correct option is option E.

Mitosis is a cell division process that occurs in most eukaryotic cells. In this process, a parent cell produces two identical daughter cells. Mitosis has five stages: prophase, metaphase, anaphase, telophase, and interphase.

Chromosomes are visible and condense during mitosis, as a result of the coiling of DNA around proteins called histones.Mitosis can be divided into four distinct stages: prophase, metaphase, anaphase, and telophase. During metaphase, the chromosomes line up on the equator of the cell, which is known as the metaphase plate.

The centromeres of the chromosomes are located on the metaphase plate. Chromosomes can then be separated and pulled to opposite poles of the cell during anaphase.

The spindle fibers of the cell, which are microtubules that connect the centrosomes to the chromosomes, are responsible for the separation and movement of the chromosomes. Therefore the correct option is option E.

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The hereditary components from smallest at the top to largest at the bottom are Genome, Chromosome, Gene, and Nucleotide and Gamete.

The set of genes that the offspring inherits from both parents, the combination of genetic material from both parents, is called the genotype of an organism. Genotype is opposed to phenotype, which is the appearance of an organism and the result of the development of its genes.

Genome, chromosomes, genes, nucleotides and gametes is the correct order of organization of genetic material from largest to smallest.

There are five basic modes of inheritance for monogenic diseases: autosomal dominant inheritance, autosomal recessive inheritance, X-linked dominant inheritance, X-linked recessive inheritance, and mitochondrial inheritance.

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Neurons have processes called dendrites that receive signals from other neurons.

Dendrites are branched structures that extend from the neuron's cell body and are the main points of contact between a neuron and its neighbors. They receive signals in the form of electrical impulses and chemicals called neurotransmitters from other neurons, and they then transmit this information to the neuron's cell body. The cell body then decides whether the neuron will send a signal down its axon to other neurons. In summary, dendrites are the input points of neurons, receiving information from other neurons and then relaying this information to the neuron's cell body.

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