The let-down reflex occurs in response to the release of oxytocin. Which of the following can stimulate the release of oxytocin? (Select all that apply.)
a. Prolactin release
b. Infant suckling
c. Infant crying
d. Sexual activity
ANS: b, c, d
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a. Prolactin stimulates milk production but does not have a direct effect on the release of oxytocin.
b. Infant suckling can cause the release of oxytocin.
c. Hearing an infant cry can cause the release of oxytocin.
d. An orgasm triggers the release of oxytocin.
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