In the male between the ages of 50 and 60, circulating levels of what hormone(s) decline? What hormone(s) experience(s) a concomitant increase in its/their circulating levels?
a. FSH and LH; testosterone
b. testosterone; FSH and LH
c. FSH; testosterone and LH
d. all of the above
Ans: b. testosterone; FSH and LH
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