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Foetal ejection reflex in human female is induced by:A. pressure exerted by amniotic fluidB. release of oxytocin from pituitaryC. fully developed foetus and placentaD. differentiation of mammary glands |
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Answer» Correct Answer - B Oxytocin (child birth hormone) secreted by neurohypophysis of pituitary gland stmulates contractio of uterus muscles. It stimulates labour pain for chid birth. When secretion of progesterone hormone declines it will result in making the end of pregnancy. As the sensory impulse of increasing labour pain reaches hypothalamus, more and more oxytocin is released from posterior pituitary under a positive feedback regulation, it dilates the cervix (vaginal stretching) |
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