Midterm 2 Study Questions - Hahn

Midterm 2 Study Questions - Hahn - 1. Describe how studies...

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1. Describe how studies of vervet monkeys have provided support for the idea that certain kinds of sex differences in human behavior may be at least partially innate. Even in Vervet monkeys, the females play with “girl toys” and males play with “boy toys.” Males more likely to gear towards mobile and action toys Females prefer to play with soft, cuddling toys There are also color preferences. It suggests that human youngsters have innate dispositions. 2. Describe an example of how synapse morphology varies between the sexes. Male rats had more MPOA synapses on dendritic shafts. Female rats had more MPOA synapses on dendritic spines. 3. What is the SDN-POA, what kind of animals was it discovered in, how does it differ between the sexes, and what is (are) the functional significance of this (these) difference (s)? Sexually dimorphic nuclei of the preoptic area [SDN-POA] and is a part of the hypothalamus. It was discovered in rats. The SDN-POA of the male are substantially larger than those of the female. Early androgen treatment produces male sized SDN-POA in females. Early castration produces female sized SDN-POA in males. It is in part responsible for male mounting behavior. 4. Same questions as above regarding the INAH. Interstitial nuclei of the anterior hypothalamus [INAH]. It was discovered in rats. Volumes of INAH-2 and INAH-3 are greater in men. Functional significance and cause of this possible difference still unknown. Effects of genetics, endocrine, environment, behavior itself? 5. What is Onuf’s nucleus, and to what does it correspond in the rat? Similar to SNB Not as dramatically dimorphic as in rats Neurological basis for sexual behavior Testosterone maintains the behavior – androgren dependent receptor in the muscles
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6. Describe the neural plasticity displayed by adult cichlid fish Haplochromis burtoni. What do you suppose the functional significance of this plasticity is? Males can switch back and forth between the territorial and the satellite forms Territorial males tend to have a large GnRH neuron body size vs nonterritorial males With bigger GnRH, they can produce more testosterone It allows for bigger growth and domination over the smaller satellite fish It can hold territory and has more resources to hold the egg pouches 7. Same question as above regarding the neural plasticity of adult songbird song systems.
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Midterm 2 Study Questions - Hahn - 1. Describe how studies...

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