Human Physiology
Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 12RA

A drug that serves as an agonist for ai receptors can be used to

a. increase the heart rate.

b. decrease the heart rate.

c. dilate the bronchioles.

d. constrict the bronchioles.

e. constrict the blood vessels.

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Tissue plasminogen activator (tPA) is helpful in reducing the effect of a stroke only under which of these conditions?A. It is helpful only if the stroke was due to a hemorrhage.B. It is helpful only if administered within the first hours after a stroke.C. It is helpful only if the patient practices relevant movements while taking the drug.D. It is effective only for laboratory animals, not for humans.
The atrioventricular node is located in the: A. right atrium B. right ventricle C. septum between the right and left atrium D. juncture between the right atrium and ventricle       Preganglionic parasympathetic neurons release NT that binds to: A. nicotinic acetylcholine ligand-gated receptors B. muscarinic acetylcholine GPCRs C. beta-1 norepinephrine GPCRs D. norepinephrine ligand-gated receptors
A stroke results froma. hemorrhage in the brain.b. a blockage of a blood vessel in the brain.c. a deficiency of tissue plasminogen activator.d. Both a and b are correct.
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