Chp 16 Questions

FSH stimulates sperm production in the testes.

A man has been told that he is NOT synthesizing enough follicle-stimulating hormone (FSH), and for this reason he may be unable to father a child. Choose the correct statement to explain this problem. The man must be producing progesterone, which inhibits the synthesis of FSH. FSH stimulates sperm production in the testes. FSH stimulates estrogen secretion by ovarian cells; therefore, it is not synthesized by males. A hormone made in the anterior pituitary cannot influence fertility.

glucagon

During an afternoon class, Lisa starts to feel hungry and worries that her blood sugar level may be dropping. Which hormone is helping to prevent a drop in blood sugar level? aldosterone thyroxine insulin glucagon

hypophyseal portal system

Several hormones are synthesized in the hypothalamus and transported to the anterior pituitary gland. The mechanism of transportation from hypothalamus to anterior pituitary gland is through the ________. hepatic portal system feedback loop hypophyseal portal system general circulatory system

entering the nucleus of a cell and initiating or altering the expression of a gene

Steroid hormones exert their action by ________. entering the cell and activating mitochondrial DNA binding cell receptors and initiating cAMP activity entering the nucleus of a cell and initiating or altering the expression of a gene activating the hypothalamic release of regulating hormones

the presence of the appropriate receptors on the cells of the target tissue or organ

The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on ________. the location of the tissue or organ with respect to the circulatory path the membrane potential of the cells of the target organ the presence of the appropriate receptors on the cells of the target tissue or organ nothing—all hormones of the human body are able to stimulate any and all cell types because hormones are powerful and nonspecific

parathyroid hormone

The single most important regulator of calcium levels in the blood is ________. parathyroid hormone calcitonin thyroid hormone gonadotropic hormones

melatonin

Upon landing at the airport in Lagos, Nigeria, Eric feels wide awake even though the local time is 11pm. Which synthetic hormone supplement could he administer to help adjust to the new time zone? melatonin insulin glucagon growth hormone

leptin

Which of the following hormones suppresses appetite and increases energy expenditure? gastrin aldosterone secretin leptin

zona reticularis — gonadocorticoids

Which of the following is correctly matched? adrenal medulla — glucocorticoids zona fasciculata — mineralocorticoids zona glomerulosa — epinephrine and norepinephrine zona reticularis — gonadocorticoids

thymus

At age 85, Lyle's immune system does not respond to vaccines as well as it did when he was younger. The atrophy of which endocrine gland is likely responsible for this? thyroid adrenal anterior pituitary thymus