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Daniel [21]
3 years ago
10

What is a functionally specialized region of a cell membrane, typically characterized by the presence of specific proteins, call

ed?
Biology
1 answer:
solniwko [45]3 years ago
7 0

Answer: Membrane domain

Explanation:

Membrane domains are regions of the plasma membrane that have a specific functional specialization. They arise from movement restriction of the components of the membrane.  If we examine the detail of the structure of many transmembrane proteins, we see that they often possess three different domains, two hydrophilic and one hydrophobic.

  • Hydrophilic domain (formed by hydrophilic amino acids) at the N-terminal end projects to the external medium. The hydrophobic domain in the middle of the peptide chain (often only about 20-30 amino acids) is across the plasma membrane and a hydrophilic domain at the C-terminal end protrudes into the cytoplasm.

  • The transmembrane domain, because its amino acids have hydrophobic side chains, is "comfortable" in the hydrophobic layer of the plasma membrane.

<u>Since these transmembrane domains "anchor" the protein to the lipid bilayer, these proteins do not float freely and cannot be isolated without first dissolving the lipid bilayer with detergents. </u>

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The pH scale measures how basic or acidic a substance is, and it ranges from 0 to 14. On the pH scale, a pH of 7 is neutral, less than 7 is acidic and higher than 7 is basic.

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When would be a good time in San Francisco to collect seashells? Explain your answer.
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The United States uses units such as inch, mile, ounce, and pound. Most of the rest
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quizlet i]n the heart, valves are located in the heart, valves are located just between the ventricles and the arteries. just be
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In the heart, the valves are located between atria and ventricles and between ventricles and arteries (option D).

<h3>What are valves in the heart?</h3>

Valves are membranous partitions which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction.

Valves in the heart enforce a one-way blood flow through the heart and separate atria from ventricles, and ventricles from the large arteries that leave them.

The four valves in the heart and their location is as follows:

  1. tricuspid valve: located between the right atrium and the right ventricle
  2. pulmonary valve: located between the right ventricle and the pulmonary artery
  3. mitral valve: located between the left atrium and the left ventricle
  4. aortic valve: located between the left ventricle and the aorta.

The valves between the atria and ventricles are called atrioventricular valves or cuspid valves while those at the bases of the large vessels leaving the ventricles are called semilunar valves.

Therefore, it can be said that the valves of the heart are located between atria and ventricles and between ventricles and arteries.

Learn more about valves of the heart at: brainly.com/question/28266922

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