試題詳解

35. Which of the following is an example of positive feedback control in homeostasis?
(A)During the birth process, stretch receptors in the uterus stimulate the release of oxytocin from the pituitary gland. This hormone stimulates uterine muscle contraction that increases stimulation of the stretch receptors.
(B)Blood volume and pressure drop due to bleeding. This decreased pressure causes the kidneys to increase water reabsorption to increase blood volume and pressure.
(C) Glucose levels rise following consumption of a big dessert, triggering release of insulin which causes glucose levels to fall.
(D)Blood levels of glucose fall during sustained exercise, causing the release of glucagon which stimulates the release of glucose into the blood.