HUMAN PHYSIOLOGY: AN INTEG ACCESS C
8th Edition
ISBN: 9780134714837
Author: Silverthorn
Publisher: PEARSON
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Chapter 21, Problem 24RQ
Using what you have learned about epithelial transport, draw a picture of the salivary duct cells and lumen. Arrange the following membrane channels and transporters on the apical and basolateral membranes so that the duct cell absorbs Na+ and secretes K+: ENaC, Na+-K+-ATPase, and K+ leak channel. With neural stimulation, the flow rate of saliva can increase from 0.4 mL/min to 2 mL/min. What do you think happens to the Na+ and K+ content of saliva at the higher flow rate?
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Question: Pierre G. just accidentally ingested a substance in the lab that he shouldn't have (that's what he gets for eating in the lab!). He quickly googles what to expect, and he sees that the substance blocks the Na+/K+ pumps on the basolateral membrane of his small intestine's enterocytes. Yikes! He asks you, his favorite physiologist, what to expect.
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A patient came to a dental clinic with complaints of dry mouth and multiple dental caries lesions. In the course of collecting anamnesis, it was found that an allergic patient takes antihistamines that block the H2 histamine receptors of smooth muscle cells of the salivary glands. It is known that histamine is a mediator that stimulates the secretion of saliva. Explain the mechanism of action of these drugs if it is known that the next day after discontinuation of the drug, the patient's dryness disappeared. For this:
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Chapter 21 Solutions
HUMAN PHYSIOLOGY: AN INTEG ACCESS C
Ch. 21.1 - Prob. 1CCCh. 21.1 - Prob. 2CCCh. 21.1 - Prob. 3CCCh. 21.2 - Define digestion. What is the difference between...Ch. 21.2 - Prob. 5CCCh. 21.2 - Draw a cell showing (1) an enzyme in a cytoplasmic...Ch. 21.2 - Prob. 7CCCh. 21.2 - Prob. 8CCCh. 21.2 - Prob. 9CCCh. 21.3 - Prob. 10CC
Ch. 21.4 - Prob. 11CCCh. 21.6 - Do bile salts digest triglycerides into...Ch. 21.6 - Prob. 13CCCh. 21.6 - Prob. 14CCCh. 21.6 - What activates pepsinogen, trypsinogen, and...Ch. 21.6 - Prob. 16CCCh. 21 - Match each of the following descriptions with the...Ch. 21 - Prob. 2RQCh. 21 - Prob. 3RQCh. 21 - Prob. 4RQCh. 21 - Prob. 5RQCh. 21 - Prob. 6RQCh. 21 - What purposes does motility serve in the...Ch. 21 - Prob. 8RQCh. 21 - Match each of the following cells with the...Ch. 21 - Prob. 10RQCh. 21 - Prob. 11RQCh. 21 - Prob. 12RQCh. 21 - Prob. 13RQCh. 21 - What role do paracrines play in digestion? Give...Ch. 21 - Prob. 15RQCh. 21 - Prob. 16RQCh. 21 - Prob. 17RQCh. 21 - Prob. 18RQCh. 21 - Prob. 19RQCh. 21 - Prob. 20RQCh. 21 - Prob. 21RQCh. 21 - Prob. 22RQCh. 21 - Mary Littlefeather arrives in her physicians...Ch. 21 - Using what you have learned about epithelial...Ch. 21 - Intestinal transport of the amino acid analog MIT...
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