17.2 True/False Questions
1) The pituitary gland atrophies with age and by age 80 is replaced by adipose tissue.
2) All endocrine glands secrete their hormones into the bloodstream.
3) An endocrine cell that secretes its hormone in response to the presence of another hormone is said to be controlled by humoral stimuli.
4) Gonadotropic cells of the anterior lobe of the pituitary secrete prolactin.
5) Gonadotropic cells of the pars distalis are the only class of cells there that produce more than one hormone.
6) Thyroglobulin is produced by follicular cells of the thyroid gland, bound to thyroid hormone, and stored inside the follicle.
7) Steroid hormones are synthesized from cholesterol.
8) The adrenal medulla consists of three distinct zones and secretes steroid hormones.
9) The endocrine cells of the pancreas are present in islets, whereas the exocrine cells are in acini.
10) The heart contains endocrine cells that secrete atrial natriuretic peptide (ANP).
11) Releasing hormones from the hypothalamus diffuse from the secondary capillary plexus to activate target cells in the pars distalis.
12) In diabetes mellitus, the posterior lobe of the pituitary does not produce sufficient antidiuretic hormone.
13) Only GH, DHEA, and the sex hormones show marked decline in secretion with age.
14) Hypersecretion of glucocorticoid hormones leads to Cushing's disease.
15) Melatonin production by the pineal gland involves signals transmitted by thoracic and cervical nerves.