Which of the following is an example of negative feedback?
A) During birthing contractions, oxytocin is released and acts to stimulate further contractions.
B) When a baby is nursing, suckling leads to the production of more milk and a subsequent increase in the secretion of prolactin.
C) A stressful stimulus leads to the release of epinephrine, which increases fatty acid and glucose in the blood and cardiovascular activity.
D) When the level of glucose in the blood increases, the pancreas produces and releases the hormone insulin. Insulin acts to decrease blood glucose. As blood glucose decreases, the rate of production and release of insulin decreases.
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