Which statement is true about the thyroid hormones? (1) They increase the rate of metabolism in cells
throughout the body. (2)They control how quickly cells use energy. (3) They are not steroid hormones.
(4) They are released by the parathyroid glands.
a. 1 only
b. 1 and 2
c. 1, 2, and 3
d. 1, 2, 3, and 4