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题库 / Prep2007E1-CR-64
Adult female rats who have never before encountered rat pups will start to show maternal behaviors after being confined with a pup for about seven days. This period can be considerably shortened by disabling the female's sense of smell or by removing the scent-producing glands of the pup.
Which of the following hypotheses best explains the contrast described above?
The sense of smell in adult female rats is more acute than that in rat pups.
The amount of scent produced by rat pups increases when they are in the presence of a female rat that did not bear them.
Female rats that have given birth are more affected by olfactory cues than are female rats that have never given birth.
A female rat that has given birth shows maternal behavior toward rat pups that she did not bear more quickly than does a female rat that has never given birth.
The development of a female rat's maternal interest in a rat pup that she did not bear is inhibited by the odor of the pup.
解释MBT/con题
屏蔽成年母鼠的嗅觉→它出现maternal behaviors（MB）的时间缩短
A、成年母鼠的嗅觉比幼鼠灵敏，无关对比
B、当出现在不是亲生母亲的母鼠面前，幼鼠散发的气味更多，无关对比
C、生过宝宝的母鼠嗅觉比没生过的更灵敏，无关对比
D、对于非亲生孩子，生过宝宝的母鼠比没生过的更快展现MB，无关对比
E、母鼠通过气味辨别孩子，CORRECT（所以如果嗅觉屏蔽，它就认不出自己的孩子了）
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