Author Question: A student asks the pharmacology instructor to explain the action of anticholinergic agents. What ... (Read 29 times)

rachel9 · **on:** Jul 23, 2018

A student asks the pharmacology instructor to explain the action of anticholinergic agents. What would be the instructor's best response?

A) They block nicotinic receptors.
B) They compete with serotonin for muscarinic acetylcholine receptor sites.
C) They act to block the effects of the parasympathetic nervous system.
D) They increase norepinephrine at the neuromuscular junction.

Question 2

A nurse is discussing ways the body protects itself against infection.

What are the microscopic, hair-like projections of the cell membrane found in the nasal cavity, which transport foreign substances toward the throat where it can be swallowed and kept away from the respiratory system? A) Goblet cells
B) Cilia
C) Alveolar sacs
D) Sinuses

gcook · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

C
Feedback:
Drugs that are used to block the effects of acetylcholine are called anticholinergic drugs. Because this action lyses, or blocks, the effects of the parasympathetic nervous system, they are also called parasympatholytic agents. The drug works by blocking only the muscarinic effectors in the parasympathetic nervous system. They compete with acetylcholine for the muscarinic acetylcholine receptor sites. They do not block the nicotinic receptors and have little or no effect at the neuromuscular junction.

Answer to Question 2

B
Feedback:
Cilia are found in the epithelial cells of the lining of the nasal cavity and are constantly in motion directing mucus and trapped substances down toward the throat. Goblet cells are found in the epithelial lining and produce mucus, which traps foreign substances. Alveolar sacs are located in the lower respiratory tract and are considered the functional units of the lung. Sinuses are air-filled passages through the skull, which open into the nasal cavity.