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The correct answer is 2. Cholesterol inhibits crystallization that would otherwise occur in membranes rich in unsaturated fatty acids. In order to guarantee a constant fluidity of the membrane
Cold-blooded animals depend on the temperature of the environment around them to maintain their internal temperature, their blood is not cold. Their body temperature fluctuates, depending on the external temperature of the environment. If it's 30°F outside, your body temperature will eventually normalize to 30°F as well. If it eventually goes up to 120°F, your body temperature will follow the same pattern at 120°F. membrane fluidity
The cell membrane of cold-blooded animals contains cholesterol, which acts as a shield for the membrane. The fluidity of the membrane increases with temperature, as the temperature increases, the fluidity of the membrane increases and decreases when the temperature decreases.
Most cold-blooded animals adjust their eating habits to contain more unsaturated fats from plant sources. This helps them maintain motor coordination and membrane fluidity through the long winter.
Cold-blooded animals modulate the fatty acid composition of their membrane to stabilize their membrane fluidity
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