C.ability to translocate into the nucleus after binding their ligand D.ability to activate Phospholipase C E ability to activate adenylyl clyclase Question 25 Endocrine signaling and synaptic signaling always share which one of the following characteristics A.a specific class of cells releases a specific molecule by exocytosis B.the receptors for the signaling molecule are on the cell surface C.the signaling molecules are polypeptides D.the signaling molecules are transported via the blood stream E the signaling molecules have transient (tenporary)effects on their target cells Question#26 Parathyroid chief cells respond to low serum calcium by A discharging stored calcium into the blood B.synthesizing calcitonin C.synthesizing vitamin D D.seceting ore parathyroid hormone E differentiating into oxyphil cells Question #27 Serotonin.like epinephrine,is a biogenic amine In enteroendorcrine cells that produce serotonin most of the serotonin is found A associated with receptors in the nucleus B in the lumen of the endoplasmic reticulu in secretion granules D.free in the cytosol E.bound to transporters in the plasna membrane Question年28 Adrenal cortical cells typically contain abundant smooth endoplasmic reticulu This reflects their specialization for A.synthesis and export of phospholipids B.secretion of adrenocorticotropic hormone (ACTH) C.secretion of epinephrine (adrenalin) production of steroid h mones E secretion of lipoproteins Question 29 The hypophyseal portal systen functions as part of the comunication pathway in which one of the followingC. ability to translocate into the nucleus after binding their ligand D. ability to activate Phospholipase C E. ability to activate adenylyl clyclase -------------------------------------------------------------------------------- Question # 25 Endocrine signaling and synaptic signaling always share which one of the following characteristics A. a specific class of cells releases a specific molecule by exocytosis B. the receptors for the signaling molecule are on the cell surface C. the signaling molecules are polypeptides D. the signaling molecules are transported via the blood stream E. the signaling molecules have transient (temporary) effects on their target cells. -------------------------------------------------------------------------------- Question # 26 Parathyroid chief cells respond to low serum calcium by A. discharging stored calcium into the blood B. synthesizing calcitonin C. synthesizing vitamin D D. seceting more parathyroid hormone E. differentiating into oxyphil cells -------------------------------------------------------------------------------- Question # 27 Serotonin, like epinephrine, is a biogenic amine In enteroendorcrine cells that produce serotonin , most of the serotonin is found A. associated with receptors in the nucleus B. in the lumen of the endoplasmic reticulum C. in secretion granules D. free in the cytosol E. bound to transporters in the plasma membrane -------------------------------------------------------------------------------- Question # 28 Adrenal cortical cells typically contain abundant smooth endoplasmic reticulum. This reflects their specialization for A. synthesis and export of phospholipids B. secretion of adrenocorticotropic hormone (ACTH) C. secretion of epinephrine (adrenalin) D. production of steroid hormones E. secretion of lipoproteins -------------------------------------------------------------------------------- Question # 29 The hypophyseal portal system functions as part of the communication pathway in which one of the following