College Level Human Sexuality

ANSWERS TO COURSE QUIZ 1. Answer: a. The dartos and cremaster muscles will contract or relax in order to increase or decrease testicular temperature during extremes of the environment around them.

2. Answer: d. The tunica albuginea is the tough outer layer of the testes. It is white in color and internally divides the testis into up to 400 lobules.

3. Answer: b. Cryptorchidism is the failure of the testes to descend in utero, which normally happens during the seventh month of intrauterine life.

4. Answer: c. There are tight junctions between Sertoli cells that provide the blood-testes barrier that can prevent autoantibodies from getting to the germ cells in order to generate an immune response.

5. Answer: d. A sperm stem cell or the least mature of all the sperm cells is called a spermatogonium. It undergoes meiosis to make increasingly mature spermatozoa.

6. Answer: b. Spermiogenesis is what happens to an immature sperm cell in order to change its features to look more like mature sperm.

7. Answer: a. The acrosome is the cap on the front end of the sperm cell that contains enzymes which are responsible for burrowing into the egg cell coating.

8. Answer: a. The glans penis is the most sensitive part of the penis because it contains the most nerve cell endings.

9. Answer: c. The prepuce is also called the foreskin. It is a collar around the end of the penis that retracts during sexual arousal.

10. Answer: b. It is luteinizing hormone that is responsible for the stimulation of the Leydig cells that, in turn, make testosterone. Luteinizing hormone is made by the pituitary gland.

11. Answer: a. The clitoris is the part of the female external genitalia that is analogous to the male glans penis. It has the great number of nerve endings and is highly sensitive to stimulation.

12. Answer: d. The mons pubis is the anterior fat pad in women that covers the pubic bone. After puberty, this is covered with hair.

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