the cardiovascular effects of epinephrine in a person treated with pehntolamine will most closely resemble the responses after the adminstration of: A. Isoproterenol B. Norepiniephrine C. Labetalol D. Prazosin
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- Tumors of the adrenal medulla, called pheochromocytomas, cause hypersecretion of catecholamines. Describe the expected signs and symptoms of this tumor.Selective destruction or removal of the adrenal cortex is fatal, but destruction orremoval of the adrenal medulla produces no clear adverse effect. Explain why these two parts of the adrenal gland would differ?so much in their necessity to life?The adrenal medulla consists of modified postganglionic neurons of the _____ nervous system.
- Explain the mechanism which underlies the cardiovascular affects of epinephrine and norepinephrine in terms of the distribution od adrenergic receptor types.Explain the role of ACTH in the regulation of the adrenalcortex hormonesCertain endocrine disorders, such as Cushing syndrome, can becaused by excessive secretion of a hormone (in this case, ACTH) bythe pituitary gland, or by a problem with the adrenal gland itself. Ifyou were able to measure the ACTH levels of a Cushing patient,how could you tell the difference between a pituitary problem and aprimary adrenal gland problem?
- Epinephrine 1) transmits information across the synapse in the brain but is 2) also released by the adrenal glands into the blood supply. Which neurochemical roles is epinephrine playing in these descriptions? A) 1) neurotransmitter and 2) neurohormone B) 1) neuromodulator and 2) neurohormone C) 1) neurohormone and 2) neuromodulator D) 1) neurotransmitter and 2) neuromodulatorDescribe the main mechanisms by which G proteins are activated upon norepinephrine bindingEnkephalins and endorphins are referred to as “nature’s opiates.” Explain this saying.
- Two men are diagnosed with diabetes insipidus. One didn’t have the disorder until he suffered a stroke. The other had a withstood the condition all his life, and it had never responded to exogenous ADH despite the presence of normal ADH receptors. What might be the cause of the diabetes insipidus in the two men?Using the below diagram, label each part along with its function. Also identify where ADH acts?A.Where are Epinephrine and Norepinephrine made? (cells, organ) B.What organ/or cells secrete them? (may differ from site of formation) C.What stimulates their secretion? Explain negative feedback control of secretion. D.Where do they work (target) E.What do they regulate: physiological outcome?