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Question

The Fetal ejection reflex in humans triggers


A

placental delivery

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B

release of oxytocin from maternal pituitary

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C

release of HCG from the placenta

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D

release of oxytocin from the fetal pituitary

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Solution

The correct option is B

release of oxytocin from maternal pituitary


Signals from a fully grown foetus and its placenta induce mild contractions in the uterus known as the fetal ejection reflex. This triggers a neuroendocrine loop which stimulates the mother’s pituitary gland to secrete oxytocin, which in turn increases uterus contractions.


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