Final answer:
Fatty acids are essential for cell membrane fluidity and flexibility, while cholesterol helps regulate membrane rigidity and fluidity.
Explanation:
Fatty acids are crucial components of cell membranes due to their impact on membrane fluidity and flexibility. They influence the physical and chemical properties of cell membranes, affecting functions such as receptor expression and protein activity. Additionally, cholesterol plays a role in modulating membrane rigidity and fluidity, contributing to the structure and function of the cell membrane.
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