The human male produces about ____
a. 100 million sperm per day c. 300 million sperm per day
b. 200 million sperm per day d. 400 million sperm per day
C
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How do the leading causes of death in the United States today compare with those in the early 1900s?
A. As in the early 1900s, infectious diseases represent the leading causes of death in the U.S. today. B. In the early 1900s, behavioral factors played a large part in the leading causes of death, just as they do today. C. In the early 1900s, the leading causes of death were largely infectious; today, behavioral factors play a bigger role. D. Behavioral factors contributed substantially to the leading causes of death in the early 1900s. Today, infectious diseases are the main causes of death.
During REM sleep, specific brainstem neurons show reduced activity. What types of neurotransmitters are released by these neurons?
a. ?serotonin and dopamine b. ?serotonin and norepinephrine c. ?glutamate and dopamine d. ?glutamate and norepinephrine
Gender dysphoria is diagnosed when
A. a person's physical sex is inconsistent with the person's sense of who he or she really is. B. an individual receives sexual pleasure from cross-dressing. C. an individual is born with ambiguous genitalia. D. all of these are correct.
In most cases, injection of dexamethasone
A. suppresses cortisol release in healthy controls but not in patients with depression. B. suppresses cortisol release in patients with depression but not in healthy controls. C. increases cortisol release in healthy controls but not in patients with depression. D. increases cortisol release in patients with depression but not in healthy controls.