During childbirth,as a baby's head is pressed against the mother's cervix,signals are relayed via nerves from cervix to the mother's brain.The brain initiates the secretion of oxytocin (a hormone)from the mother's pituitary gland.Oxytocin stimulates further uterine contractions.As the uterus contracts even harder in response to oxytocin,the baby's head is pushed harder against the cervix;this stimulates yet more nerve signals to the mother's brain,resulting in yet more oxytocin secretion until finally the baby is pushed through the cervix.The integrating center in this process of childbirth is
A)the mother's brain.
B)the mother's cervix.
C)the nerve signals to the mother's brain.
D)oxytocin.
E)the mother's pituitary gland.

Question

Quizplus · Accepted Answer

The mother's brain serves as the integrating center in the process of childbirth, as it receives signals from the cervix and initiates the secretion of oxytocin from the pituitary gland, which in turn stimulates further contractions of the uterus. The process continues until the baby is pushed through the cervix. Therefore, choice A is the best answer.

During Childbirth,as a Baby's Head Is Pressed Against the Mother's