This mineral is a cofactor of the carbonic anhydrase enzyme system.
A) chloride
B) calcium
C) copper
D) zinc
E) magnesium
D) zinc
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Erection is caused by muscle contraction in the penis.
Answer the following statement true (T) or false (F)
Which of the following is an accurate statement regarding regulation of pituitary hormone secretion by the hypothalamus?
a. all pituitary hormones are regulated by tropic hormones from the hypothalamus. b. all anterior pituitary hormones are regulated by a releasing hormone and release inhibiting hormone from the hypothalamus. c. all posterior pituitary hormones are regulated by a releasing hormone from the hypothalamus. d. all anterior pituitary hormones are tropic hormones. e. none of the above.
Vitamin __________ is a molecule synthesized partly in the skin that enhances absorption of calcium by the small intestine.
Fill in the blank(s) with the appropriate word(s).
Glucose is a
A. polar molecule, and therefore it dissolves readily in plasma. B. polar molecule, and therefore it requires a transporter in the blood. C. nonpolar molecule, and therefore it dissolves readily in plasma. D. nonpolar molecule, and therefore it requires a transporter in the blood.