What structure provides nutrients from the mother to the fetus, takes waste products away from the fetus, and protects the fetus from bacteria and waste in the mother's blood?
a. the placenta
b. the umbilical cord
c. the amnion
d. the germinal structure
Answer: A
Psychology
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Recent studies have reported that variations in ________ are related to individual differences in hypnotizability
a. norepinephrine. b. serotonin c. GABA d. COMT
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Which physiological response results from activation of the sympathetic nervous system?
a) slowed breathing b) constricted pupils c) stimulated digestion d) increased heart rate
Psychology