Which of the following statements regarding male reproductive function is FALSE?
A. Sperm formed in the testes enter the epididymis before entering the vas deferens.
B. Sperm entering the epididymis are fully motile.
C. The Sertoli cells produce androgen-binding protein.
D. The seminal fluid is alkaline and rich in nutrients.
E. Most of the seminal volume is provided by the secretions of the seminal vesicles and prostate gland.
Answer: B
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Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. How do you suppose these drugs work?
A. They prevent calcium from entering the sarcoplasmic reticulum of smooth muscle. B. They stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin. C. They prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle. D. They prevent calcium from entering cardiac muscle, thus slowing down the heart rate. E. They prevent calcium from entering smooth muscle, thus allowing the muscle to relax.
A rise in cortisol would cause an increase in each of the following except
A) the rate of glucose synthesis by the liver. B) the rate of glycogen formation by the liver. C) the level of fatty acids in the blood. D) fatty acid metabolism by muscle cells. E) ACTH levels.
Which is not a fold of peritoneum that forms a mesentery?
A. Mesocolon B. Mesentery proper C. Falciform ligament D. Intraperitoneal ligament E. Lesser omentum
The first step in bone healing involves the formation of a blood-filled swelling known as a(n) ________
A) epiphyseal line B) bony callus C) hematoma D) fibrocartilage callus