bio psych ib exam prep

Question 1

Inhibitory neurotransmitter

Answer 1

chemical/drug that binds to the postsynaptic neuron that prevents a neurotransmitter from binding to the site + prevents action potential -

Question 2

excitatory neurotramsitter

Answer 2

binds to receptor site & causes action potential to occur + increases the likelihood that a neuron will fire an action potential

Question 3

neural pruning

Answer 3

brain’s ability to decrease the amount of synapses in order to make room for new ones

Question 4

zhou

Answer 4

pheromones: AND (steriod in men) + EST (female version of AND)
aim: effects of AND + EST on heterosexual & homosexual men & women
sample: 24 hetero m, 24 hetero w, 24 homo m, 24 bi/homo w
procedure: same time each day, 3 different, all groups were in in each condition (control, AND, EST), while smelling → shown dots that represented a human motion & participants were asked to identify the sex
results: herto f + homo m w/ AND said it was male
hetero m w/ EST said it was female
shows that AND & EST may have some effect on human sexual behavior

Question 5

wedekind

Answer 5

pheromone: major histocompatability complex in the immune system → strong immune system in offspring + natural selection/evolution
aim: determine whether one’s MHC would affect mate choice
sample: