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Name ______________________________ page 1 `Psychology 335 Second Exam March 12, 2009 Put your name on both pages 1 and 2. 1. What is the single most important predictor as to whether a human couple will have sexual relations? (3 points) Day of the week (Saturday night/Sunday morning) 2. a. What does immunocytochemistry (ICC) detect? (2 points) The presence of a particular protein in cells. b. What does in situ hybridization histochemistry ( in situ ) detect? (2 points) The presence of a particular messenger RNA (mRNA) in cells. 3. What are the differences in circulating hormone levels in adult heterosexual women and lesbians? (3 points) none that we can detect 4. What are the differences in circulating hormone levels in adult heterosexual and gay men? (3 points) 5. a. What is the role of aromatization in testicular regulation of copulatory behavior in adult male rats? (2 points) Aromatization must occur in brain in order for testosterone to stimulate sexual motivation b. Give two lines of evidence for this. (4 points) Giving an aromatase inhibitor inhibits male copulatory behavior. Giving an antiestrogen inhibits male copulatory behavior. Mice without estrogen receptors (ER knockouts) exhibit poor male copulatory behavior. You can stimulate male copulatory behavior in castrated males by treating them with estradiol. 6. During copulation, male rats provide two things the female needs to become pregnant. What are they? (4 points) Vaginal-cervical stimulation and semen
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Name ______________________________ page 2 7. a. What are immediate-early genes ( e.g. , Fos)? (2 points) They are genes which are the first to be expressed (transcribed) when a cell is activated b. Why are they useful in neurobiology? (3 points) They indicate which parts of the brain were activated at the time the animal was killed. 8. a. In behavioral terms , what’s the difference between an estrous cycle and a menstrual cycle? (3 points) In estrous cycle female only interested in mating in a narrow temporal window around ovulation In menstrual cycle female willing to copulate at all stages of ovulatory cycle b. List two species that exhibit estrous cycles and two that exhibit menstrual cycles. (4 points) Estrous: rat, mouse, guinea pig, sheep – most non-primate species Menstrual: most monkeys, all apes, including human beings 9. a. At which stage of her menstrual cycle is a female monkey most likely to initiate sexual contact with a male?
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This note was uploaded on 03/31/2009 for the course MATH 131 taught by Professor Hall-seelig during the Spring '08 term at UMass (Amherst).

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