According to the text, how many sperm are in the typical ejaculation?
a. 10,000 to 20,000
b. 500,000 to 2 million
c. 100 million to 300 million
d. 800 million to 1 billion
C
Psychology
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Samantha jumps with fear as she feels a hand on her shoulder while walking on a deserted path across campus. What brain structure played a key role in Samantha's swift reaction?
A) basal ganglia B) hippocampus C) cerebral cortex D) amygdala
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High maternal licking and grooming of rat pups
a. increases expression of the GR gene in the pups b. results in more glucocorticoid receptors in the hippocampus of the pups c. increases stress resistance of the pups d. all of the above
Psychology