Insulin increases the entry of tryptophan into the brain by ____
a. weakening the blood-brain barrier
b. converting tryptophan into a compound that more easily enters the brain
c. increasing metabolic activity only in those areas of the brain that use tryptophan
d. causing certain competing amino acids to enter other cells, outside the brain
d
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The idea that some faces are inherently more attractive than others is supported by research demonstrating that
a. people prefer averaged composite faces to individual faces. b. standards of beauty change over time. c. people from different cultures enhance their appearance in different ways. d. people we like seem more attractive to us.
An English professor has just asked the students in his class to revise their term papers. He is likely to find that
a. the students will carefully evaluate whether their paper accomplishes their goals for the assignment. b. students will actually spend about 30% of their total writing time on revising. c. most students will examine only one sentence at a time, checking spelling and grammar. d. most students will be very aware of the major problems in their paper.
Generally speaking, how do graduate courses differ from undergraduate courses?
a. Graduate classes tend to be larger b. Undergraduate classes require more reading c. They are different only in name d. Graduate courses tend to be smaller
The theory of motivation that proposes that organisms seek an optimum level of stimulation is ________ theory
a. drive reduction b. arousal c. instinct d. the hierarchy of needs