Chapter 1, Problem 10RQ

Which of the following statements about insulin is true? a. Insulin acts as a transport protein, cany in g glucose across the cell membrane. b. Insulin facilitates the movement of inti acellular glucose transporters to the cell membrane. c. Insulin stimulates the breakdown of stored glycogen into glucose. d. Insulin stimulates the kidneys to reabsorb glucose into the bloodstream.

A hormone differs from a neurotransmitter in thata. hormones act extracellularly, whereas neurotransmitters act withinthe cell that synthesized them.b. hormones are released only by neurons, whereas neurotransmittersare released by many different types of cells.c. hormones cause only fast responses (seconds or less) to stimuli,whereas neurotransmitters cause slow responses (minutes to hours)to stimuli.d. hormones affect only epithelial cells, whereas neurotransmittersaffect only muscle cells.e. hormones are released into the bloodstream and can activate manycells in many parts of the body, whereas neurotransmitters arereleased by neurons and affect adjacent cells.

Which of these statements about the hormone insulin is true? a.It is secreted by alpha cells in the pancreatic islets. b.It is secreted in response to a rise in blood glucose. c.It stimulates the production of glycogen and fat. d.Both a and b are true. e.Both b and c are true.

Glucocorticoids (cortisol)a. increase the breakdown of lipids.b. increase the breakdown of proteins.c. increase blood glucose levels.d. decrease inflammation.e. All of these are correct

Which of the following correctly describes the functions of the endocrine system? a. Transport of blood through the body and through the lungs b. Regulation of body functions through hormone secretion c. Regulation of body functions through nerve impulses d. Immunity and returning extra tissue fluid to the blood vessels

Thyroid hormone is the primary hormone that regulates body temperature. It does so by a. stimulating muscle contraction. b. increasing the number of Na+/K+ pumps in neurons. c. vasoconstriction of peripheral blood vessels. d. sweating.

Hormone X appears to regulate the blood concentration of chemical Y via a negative feedback loop. a. Predict what happens to the secretion of hormone X when the blood concentration of chemical Y decreases. b. What effect will this likely have on the blood concentration of chemical Y?c. Predict what happens to the secretion of hormone X when the blood concentration of chemical Y increases.

Which of the following best describes calcitonin? A. It's released by the adrenal medulla. B. It functions to prevent hypercalcemia C. It's released by the parathyroid glands D. It functions to prevent hypocalcemia .

The adrenal medulla is derived from what type of tissue? .A. Nervous tissue . B.Connective tissue .C Muscle Tissue D. Epithelial tissue