Exam 3 of Psych 335

Exam 3 of Psych 335 - Name _ Psychology 335 Third Exam...

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Name ______________________________ page 1 Psychology 335 Third Exam April 17, 2008 1. Monkeys and rabbits differ significantly in a particular aspect of their maternal care. Explain. (3 points) Monkeys provide nearly continuous care for their infants, but rabbits only stop by their nests for a few minutes a day to nurse their babies. 2. a. What is a pheromone? (3 points) A chemical substance that is produced by an animal and serves as a signal to other individuals of the same species for one or more behavioral responses b. Give examples–other than sexual attraction –of two effects of pheromones on reproduction in mammals. (4 points) Pregnancy block Advance puberty Delay puberty Induction of estrous behavior in sows Synchrony of estrous cycles Synchrony of menstrual cycles 3. Many species of birds and some species of mammals are ‘monogamous’ in that they form a life- long pair bond with a member of the opposite sex. However, the females of these species often copulate with males other than their partners around the time of ovulation. Why do they do this? (3 points) Males who make the best long-term partners are not necessarily the ones with the ‘fittest’ genes — that is, the healthiest, most fertile ones. This way the female can have it both ways. Live with the male that’s the best partner, but pick the ‘fittest’ male and maximize the chances of passing her genes along. 4. What hormones are absolutely , positively required for the induction of maternal behavior in nulliparous rats (rats who have never seen pups before)? (3 points) None at all. You can induce maternal behavior in nullipara simply by exposing them to pups every day. Does not depend on changes in hormone levels. 5. Give an example of a behavior transmitted by mother rats to their offspring “culturally.” (3 points) levels of maternal licking and grooming food preferences 6. How do you determine whether two mice are familiar with one another? (Have they met before?) (3 points) Put them together, and see how much they sniff. If they haven’t met before, they will sniff each other a lot. Familiar animals won’t sniff each other much.
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Name ______________________________ page 2 7. a. What is the genetic deficit seen in Brattleboro rats? (2 points) defective vasopressin gene - they can’t make vasopressin b. This affects a number of behaviors. Name one. (2 points) hyperdipsic (always thirsty) because they’re always losing water in urine they’re really stupid c. How can you “repair” this behavioral abnormality in Brattleboro rats? (1 point) treat them with vasopressin 8. In class we discussed several differences between meadow voles and prairie voles with regard
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Exam 3 of Psych 335 - Name _ Psychology 335 Third Exam...

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