the ejection of milk that occurs while the infant is suckling is mediated by
a)myogenic contraction of myoepithelial cells
b)oxytocin-induced myoepithelial cell contraction
c)prolactin-induced myoepithelial cell contraction
d)local reflex-induced myoepithelial cell contraction
e)acetylcholine-induced myoepithelial cell contraction
