grams describe some of the processes that occur during labor cin? How is this di

Question

grams describe some of the processes that occur during labor cin? How is this different to the feedback regulation of glucose levels in 8. The following diag . What type of feedback regulation is ation of glucose levels in the blood? The baby pushes against the cervix causing it to stretch Estrogen Oxytocirn from placenta from fetus and mother's posterior pituitary Uterus Induces oxytocin receptors on uterus Stretching of the cervix causes nerve impulses to be sent to the brain. Oxytocin causes the uterus to Stimulates uterus contract. to contract Stimulates placenta to make Umbilical cord Cervix Prostaglandins Stimulate more vigorous contractions of uterus The brain stimulates the pituitary to release oxytocin Copyright 2010 Pearson Educaton, Inc

Explanation / Answer

Answer:

8. (a) Oxytocin is controlled by a positive feedback mechanism where release of the hormone causes an action that stimulates more of its own release. When contraction of the uterus starts, for example, oxytocin is released, which stimulates more contractions and more oxytocin to be released. In this way, contractions increase in intensity and frequency.

(b) The glucose level is regulated in pancreas by negative feedback loop, which means that when there is too much glucose, it is removed from the blood, and when there's too little, it is released into the blood.

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