Final answer:
Cholesterol is not an important body fuel source, but it is required for synthesizing cortisol and vitamin D, and is a key component of cell membranes.
Step-by-step explanation:
Cholesterol is a key component of cell membranes, helps synthesize the hormone cortisol, and is required to synthesize vitamin D. However, it is not true that cholesterol is an important body fuel source. While cholesterol plays essential roles in the body, it is not primarily used as a fuel source. Instead, the body primarily produces energy from carbohydrates and fats.