EPITHELIUM
CILIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Transport ions across the membrane
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Allow selective permeability
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Maintain fluidity
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Identify the cell
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Detailed explanation-1: -Cholesterol modulates the bilayer structure of biological membranes in multiple ways. It changes the fluidity, thickness, compressibility, water penetration and intrinsic curvature of lipid bilayers.
Detailed explanation-2: -Cholesterol influences the fluidity of the membrane, and it does so in a bidirectional manner; at high temperatures it decreases fluidity and at low temperatures it increases fluidity. At high temperatures, cholesterol’s flat, rigid structure limits phospholipid movement.
Detailed explanation-3: -Cholesterol is situated in the cell membrane in between the phospholipids. The rigid rings of the cholesterol molecule interact with the hydrophobic tails of the phospholipids. This stabilizes them and makes them more rigid as well. This makes the cell membrane less permeable to small molecules.