Tryptophan enters the brain by an active-transport protein that it shares with ____ and other large amino acids.
A. phenylalanine
B. melatonin
C. lactose
D. glucose
Answer: A
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Kelly proposed that the thinking of schizophrenics:
a. was surprisingly rational b. was disordered c. was more rational than the thinking of normals d. was well-organized
Researchers have found that the more attached you are to an area, the more likely you are to signal your "ownership" by adorning the area with
a. critical markers. b. environmental cues. c. territorial markers. d. behavioral mapping.
While puberty is beginning earlier, it is also taking
A. longer to complete in both sexes. B. longer to complete in girls. C. less time to complete in boys. D. less time to complete in girls.
In classical conditioning, a conditioned stimulus and an unconditioned stimulus are presented together during
A. habituation. B. acquisition. C. extinction. D. spontaneous recovery.