Cholesterol is commonly found in the cell membranes of warm-blooded animals because

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Cholesterol helps to stabilize the cell membrane by preventing it from becoming too flexible at body temperature. This is particularly important in warm-blooded animals, as their body temperature remains fairly constant and the cell membrane needs to maintain its shape and integrity. Excess dietary cholesterol is not necessarily stored in cell membranes, and while cholesterol is involved in certain cellular processes, it is not directly involved in muscle contractions or movement.

Cholesterol Is Commonly Found in the Cell Membranes of Warm-Blooded