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MCAT Question A Day - 7/1/14 - Answer!

Vasopressin, a hormone involved in water balance, is produced in the:

A.  hypothalamus.
B.  posterior pituitary.
C.  anterior pituitary.
D.  kidney.

A is correct. This is an important distinction to be made. The hormones of the posterior pituitary are synthesized in the bodies of neurons in the hypothalamus, and transported down the axons of these nerves to the posterior pituitary.