The human body has natural steroids, a type of lipid. What is the function of steroids in the human body? A. They store extra energy in the body. B. They build cell membranes. C. They carry chemical messages throughout the body. D. They prevent water loss from the body.

The correct option is C.

Steroid is a type of hormone. Hormones are chemical molecules that are manufactured and secreted by endocrine glands in the human body for the purpose of carrying chemical messages from one part of the body to another part. Steroid hormones are made from cholesterol and they are soluble in lipids. Examples of steroid hormones are: androgen, progesterone, estrogen, cortisol and aldosterone.