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Q1) The biochemical mechanism by which parathyroid hormone exerts its effect on

ID: 172061 • Letter: Q

Question

Q1) The biochemical mechanism by which parathyroid hormone exerts its effect on sensitive tissues is by activation of a(n) A. adenylyl cyclase. B. phosphodiesterase. C. nuclear hormone receptor. D. tyrosine kinase. E. voltage-gated Ca2+ channel.

Q2) The most prominent second messenger involved in the actions of LH, FSH and ACTH is A. Ca2+ B. cGMP C. inositol triphosphate (IP3) D. steroid receptor protein E. cAMP Q3) Aldosterone is A. a glucocorticoid. B. a mineralocorticoid. C. an androgen. D. a progestagen.

Explanation / Answer

PTH activates adenylate cyclase in vascular smooth muscle,

An important second messenger in hormonal action is cAMP

Aldosterone is the main mineralocorticoid hormone