6) A hormone may be A) inactivated by its target cell. B) All of the choices cou

Question

6) A hormone may be A) inactivated by its target cell. B) All of the choices could be correct C) inactivated by nontarget cells. D) excreted before it has a chance to act on a target cell. E) activated by its target cell. 7) How is the concentration of a hormone in plasma determined? A) only by its rate of secretion B) only by the rate of its degradation by the liver and kidneys C)by its secretion and clearance rates, and whether or not it binds to carriers and/or other plasma proteins D) by the number of its target cells in the body E) only by its rate of synthesis A) Only peptide-type hormones can bind to the carrier proteins found in the plasma. B) The tighter that a hormone binds to a carrier protein in the plasma, the faster the body can 8) Which is TRUE about hormone binding to the proteins found in plasma? usually get rid of that hormone. C) The binding proteins that transport hormones are hormones themselves D) Hydrophobie hormones like steroid and thyroid hormones need binding proteins because they are not very soluble in the blood plasma. E) Steroid hormones do not bind to plasma proteins. 9) What is a main difference between the modes of action of peptide hormones and steroid hormones? A) Peptide hormones bind to receptors on the cell surface, whereas steroid hormones bind to B) Peptide hormones bind to intracellular receptors, whereas steroid hormones bind to receptors C) Peptide hormones act as second messengers, whereas steroid hormones bind to receptors in D) There are no differences; both act by binding to intracellular receptors. intracellular receptors. on the cell surface. the cytosol. s bind to receptors on the cell surface, whereas steroid hormones act as second messengers. 10) Acting alone, epinephrine and thyroid hormone each stimulates release of only a small amount of adipose cells. In the presence of thyroid hormone, epinephrine causes a much more substantial release of fatty acids from the cells. What is the term describing the effect of thyroid hormone on epinephrine's actions? A) permissive B) agonistic C) direct D) antagonistic E) paracrine

Explanation / Answer

6. Answer: E) activated by its target cell

As the hormone would be binding to the receptor it would be initiating an event series that would be leading to generation of the second messengers, inside the cells. The hormone would be identified as the first messenger. As the hormone would be binding to the receptive Jr would trigger molecular reaction series that would be altering the cell’s physiologic state.

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