At puberty, FSH and LH
| a. | stimulate the release of additional testosterone by the testesand the release of estrogens by the ovaries. |
| b. | inhibit the release of androgens by the testes and estrogens bythe ovaries. |
| c. | stimulate the release of gonadotropin-releasing hormone. |
| d. | inhibit the release of estrogens by the testes and testosteroneby the ovaries. |
Factors that might influence recent changes in the age at whichpuberty begins include
| a. | a cultural tendency to marry later. |
| b. | reduced access to good health care. |
| c. | obesity and exposure to artificial hormones. |
| d. | exposure to cultural factors such as television. |
Dr. West loves to drink caffeinated coffee. She knows thatcaffeine makes her feel awake by
| a. | blocking receptors for serotonin. |
| b. | increasing the release of adenosine. |
| c. | stimulating nicotinic ACh receptors. |
| d. | blocking receptors for adenosine. |
