Final answer:
Cholesterol made within the body is referred to as endogenous. It is synthesized in the liver and plays important roles in the body such as being an integral part of plasma membranes and serving as a precursor for steroid hormones, vitamin D, and bile salts.
Step-by-step explanation:
Cholesterol made within the body is referred to as endogenous.
Endogenous cholesterol is synthesized in the liver using fats, proteins, and carbohydrates as raw materials. It is the most abundant steroid in the human body, and it plays important roles such as being an integral part of plasma membranes and serving as a precursor for steroid hormones, vitamin D, and bile salts.
Therefore, the correct answer is A. endogenous.