Because Vitamin D and Its Derivatives in the Body Resemble

Multiple Choice

Because vitamin D and its derivatives in the body resemble steroids, the vitamin is handled in the same way as the steroid hormones. Select a process shared by vitamin D and the steroid hormones.

A) They are made in special cells in tissues derived from the same embryological origin.
B) Their active forms are bound to intracellular receptors in their target tissues.
C) Their most active forms contain only one oxygen atom per molecule.
D) Biosynthesis is under control of a tropic hormone from the anterior pituitary.
E) Like vitamin D, the steroid hormones can originate in food as active molecules.