The level of sexual activity in male rats is related to the size of their ___,which itself is a function of ___.

Question

Quizplus · Accepted Answer

The size of the sexually dimorphic nucleus (SDN) in the preoptic area of the hypothalamus is larger in male rats than female rats, and it has been found to correlate with the level of male sexual behavior. Prenatal exposure to testosterone influences the development of the SDN and is therefore related to the level of sexual activity in male rats. Option A (MPOA) is also involved in the regulation of sexual behavior, but there is no evidence that it is influenced by prenatal exposure to stress hormones. Option B (ventromedial hypothalamus) is involved in the regulation of female sexual behavior, not male sexual behavior. Option C (SDN and prenatal exposure to estrogen) is not correct because exposure to estrogen during development is not related to the size of the SDN or male sexual behavior.

The Level of Sexual Activity in Male Rats Is Related