The hormone insulin enhances the transport of glucose (sugar) from the blood into most of the body's cells. Its secretion is controlled by a negative-feedback system between the concentration of glucose in the blood and the insulin-secreting cells. Therefore, which of the following statements is correct?
a. a decrease in blood glucose concentration stimulates insulin secretion, which in turn further lowers the blood glucose concentration.
b. an increase in blood glucose concentration stimulates insulin secretion, which in turn lowers the blood glucose concentration.
c. a decrease in blood glucose concentration stimulates insulin secretion, which in turn increases the blood glucose concentration.
d. an increase in blood glucose concentration stimulates insulin secretion, which further increases the blood glucose concentration.
e. none of these answers.
B
You might also like to view...
The outermost extraembryonic membrane that eventually helps form the placenta is the
A. amnion. B. chorion. C. yolk sac. D. hypoblast.
Answer the following statements true (T) or false (F)
1. Dynamic loading during gymnastics has been show to affect bone size and strength more than muscle mass. 2. The effects of several months intervention treatment with whole body vibration appear to include improved bone mineral density. 3. The link between cessation of menses and osteoporosis is estrogen deficiency. 4. In practical terms, a fast childhood game of hopscotch favors bone building over a very slow one. 5. Long distance runners have a much higher prevalence of secondary amenorrhea than the general population.
True or False? A tonsillectomy is the surgical repair of the tonsils. Select one:
a. true b. false
Which hormone-secreting cells are found in the thyroid gland?
A) Chromaffin cells B) Follicular cells C) Islet cells D) Chief cells