Because Vitamin D and Its Derivatives in the Body Resemble

question 35

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.

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