a. Using Figure 21.4, formulate a hypothesis to explain why anabolic steroids would shrink the size of the testes.
Answer
b. How might you test your hypothesis, for example in laboratory mice?
Answer
c. Would you predict that anabolic steroids raise or lower LDL blood levels, leading to increased risk of heart disease?
Answer
d. How might you test your hypothesis, for example in laboratory mice?
Answer
2. Considering birth-control measures:
a. Using Figure 21.8 as a guide, formulate a hypothesis to explain why a pill that contains estrogen and progesterone could be used as a birth-control pill.
Answer
b. How might you test your hypothesis, for example in laboratory mice?
Answer
c. In postmenopausal women, there are usually increased levels of FSH and LH, but because the ovaries are unable to respond, there are decreased levels of estrogen and progesterone. How would you expect these levels to change in postmenopausal women who took birth-control pills?
Answer
d. How might you test your prediction, for example in postmenopausal women?
Answer
