Final answer:
Oxytocin undergoes a positive feedback loop during childbirth, which intensifies uterine contractions until the baby is born, when the loop ends with the removal of the stimulus.
Step-by-step explanation:
True, oxytocin is involved in a positive feedback loop during the process of childbirth. The events unfold as follows: oxytocin stimulates the uterus to contract, which pushes the baby against the cervix, causing it to stretch. This cervical stretching results in nerve impulses being sent to the brain that stimulate the hypothalamus to produce more oxytocin, which is then released by the pituitary gland. This loop continues with increasing intensity of uterine contractions and further dilation of the cervix until the baby is born, and then oxytocin release is decreased.
The birth of a human infant is indeed the result of a positive feedback mechanism. When the head of the infant pushes against the cervix, it triggers the release of oxytocin, which increases the contractions of the uterus, leading to the dilation of the cervix. The birth of the baby marks the end of this feedback loop, as the stimulus (cervical pressure) is removed, which in turn stops the production of oxytocin and the contractions cease.
Oxytocin undergoes a positive feedback loop during childbirth. The initial release of oxytocin signals the uterine muscles to contract, which causes the cervix to stretch. In response to the stretching of the cervix, the pituitary gland releases more oxytocin, causing labor contractions to intensify. This positive feedback loop continues until the baby is born.