relies on release of chemical that bind to specific receptors Which of these characteristics is exclusive to the endocrine system when compared with the nervous system? relies on release of chemical that bind to specific receptors relies primarily on negative feedback mechanisms uses epinephrine and norepinephrine as chemical messengers effective in coordinating cell, tissue, and organ activities on a sustained, long-term basis Answer: d

What is one of the endocrine functions of the hypothalamus? It secretes regulatory hormones that influence endocrine cells in the anterior pituitary gland. It has autonomic centers that exert direct neural control over endocrine cells of the adrenal cortex. Hypothalamic neurons synthesize hormones like ADH that increase the elimination of water from the body. All of the above are correct. Answer: a

What statement below is true of peptide hormones? They are derivatives of arachidonic acid. They are synthesized by ribosomes and are lipophilic. They are also called biogenic amines and are synthesized from tyrosine. They are chains of amino acids such as glycoproteins, small proteins, or polypeptides. Answer: d

If levels of calcium are low in the blood, what hormone would restore calcium to homeostasis? a. calcitonin b. parathyroid hormone c. insulin d. glucagon Answer: b

What is the role of FSH in males? It stimulates production of sex hormones. It stimulates the breakdown of stored triglycerides by adipocytes. It stimulates nurse cells, which then promote the maturation of sperm. It stimulates smooth muscle contraction in the ductus deferens and prostate gland. Answer: c

Which pancreatic cell type is paired with the hormone it produces? a. alpha cells / pancreatic polypeptide b. F cells / a hormone identical to growth hormone–inhibiting hormone c. beta cells / insulin d. delta cells / glucagon Answer: c

Which statement is a function of insulin? a. It will facilitate the transport and utilization of glucose by cells. b. It promotes protein synthesis. c. It will decrease storage of glucagon in the cell. d. Both A and B are functions of insulin. Answer: d

Which of the following is an effect of glucagon? accelerated glucose uptake and utilization breakdown of triglycerides in adipose tissue stimulation of amino acid absorption and protein synthesis stimulation of glycogen formation Answer: b

liver; produce glucose pancreas and adrenal cortex; produce insulin Cells in the ___ are insulin independent, which means that they can ____. brain, kidneys, and digestive tract; absorb glucose without insulin stimulation liver; produce glucose pancreas and adrenal cortex; produce insulin adrenal cortex and adrenal medulla; function without insulin Answer: a

Less water is reclaimed by osmosis in the kidneys. Why are diabetics continuously thirsty and why do they frequently urinate? Less water is reclaimed by osmosis in the kidneys. Water loss reduces blood volume, promoting secretion of ADH. Glucose is lost in the urine, which increases blood volume. A and B are correct. Answer: d

Increased amounts of sunlight inhibit the production of which hormone? a. prolactin b. melanocyte-stimulating hormone c. aldosterone d. melatonin Answer: d

Which of the following would result from the overproduction of glucocorticoids? a. Graves disease b. Addison’s disease c. diabetes mellitus d. Cushing’s disease Answer: d

Deficiencies of which hormones impede normal skeletal development? a. GH, thyroid hormone, PTH, and reproductive hormones b. prolactin, FSH, LH, GH c. thyroid hormone, melatonin, PTH, calcitonin d. GH, TSH, ACTH, FSH Answer: a

conservation of glucose for neural tissues All of the following EXCEPT ___ occur during the resistance phase of the general adaptation syndrome. conservation of glucose for neural tissues mobilization of remaining lipid and protein reserves conservation of Na+ and loss of K+ and H+ increased mental alertness and increased blood pressure Answer: d

a. increased heart rate and force of contraction Which of the following is NOT an effect of thyroid hormones on major organ systems? a. increased heart rate and force of contraction b. increased sensitivity to sympathetic stimulation c. decreased turnover of minerals in bone d. stimulation of red blood cell formation Answer: c

The removal of the parathyroid glands results in a decrease in the blood concentration of which important mineral? a. calcium ions b. phosphate ions c. sodium ions d. potassium ions Answer: a

a. decreased formation and secretion of calcitriol Failure of the zona glomerulosa to secrete aldosterone would result in ________. a. decreased formation and secretion of calcitriol b. enhanced reabsorption of Ca2+ at the kidneys c. loss of Na+, K+ retention, and decreased reabsorption of water at the kidneys d. none of the above Answer: c

a. decreases glucose synthesis; stimulatory Secretion of cortisol by the zona fasciculata ____ in the liver and has a(n) _____ effect on CRH in the hypothalamus. a. decreases glucose synthesis; stimulatory b. increases glucose synthesis; inhibitory c. increases androgen production; antagonistic d. decreases glycogen synthesis; synergistic Answer: b

a. promotes muscle mass and supports libido in females Melatonin is well known for its role in regulating circadian rhythm. What are two other functions of melatonin? a. promotes muscle mass and supports libido in females b. testicular feminization and gynecomastia in males c. inhibiting reproductive functions and protecting CNS neurons from free radicals d. promoting early puberty and increasing rates of oxygen consumption Answer: c

Both increase cardiac activity and blood pressure. In what ways are hormonal effects of E and NE from the adrenal medulla similar to the effects of glucocorticoids from the zona fasciculata? Hormones from both are under the ultimate control of the sympathetic nervous system. Both increase cardiac activity and blood pressure. Both are stimulated by angiotensin II. Both increase blood glucose levels and promote the breakdown of stored fats into fatty acids. Answer: d