LABORATORY REVIEW
DIFFUSION AND OSMOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They help hold a membrane together.
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They alter the fluidity of the membrane.
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They attach to carbohydrates.
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They disrupt membrane function.
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Detailed explanation-1: -Cholesterol is also a key determinant of membrane fluidity: at high temperatures, cholesterol acts to stabilize the cell membrane and increase its melting point; while at low temperatures, it inserts into phospholipids and prevents them from interfering with each other to avoid aggregation [39].
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 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-4: -Cholesterol augmentation reduces fluidity and water content of the membrane and favors A association (clusters) on the surface of the bilayer.