Research focusing on a substance called corticotrophin-releasing factor (CRF) reveals which of the following in relation to the development of anxiety disorders?
a) When chemical substances such as adrenocorticotropic hormone (ACTH) and beta-endorphins are injected into the brains of mice, the animals behave in ways that do not suggest the presence of depression and anxiety.
b) CRF neurons are present in areas of the brain that regulate fear.
c) Animals placed in stressful situations respond with diminished CRF activity in the thalamus and corpus callosum.
d) Heightened and persistent CRF activity in the hypothalamus and the amygdala suggest that early life experiences such as loss, separation, or abuse may change brain activity, making that person more vulnerable to developing emotional disorders.
Ans: d) Heightened and persistent CRF activity in the hypothalamus and the amygdala suggest that early life experiences such as loss, separation, or abuse may change brain activity, making that person more vulnerable to developing emotional disorders.
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Igor is approached by a mad scientist who says he will pay Igor either $100 for each pair of his autosomes or $500 for each pair of his sex chromosomes. Assuming Igor wants to make as much money as possible, which offer should he take?
a. $100 for each pair of autosomes b. $500 for each pair of sex chromosomes c. Either one, because Igor will make the same amount with both offers d. Neither one, because humans have neither autosomes nor sex chromosomes