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.
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.
You might also like to view...
An HIV-positive client in her 36th week of gestation has been admitted to the labor and birth suite. A review of the client's history reveals the use of which drug?
A) Zidovudine B) Heparin C) Methotrexate D) Hydroxyurea
When working on a hospital unit, the nurse should begin the discharge planning process at which time?
a. With a careful review of initial admission data. b. Within 24 hours of the hospital admission. c. Just prior to the client's hospital admission. d. Immediately before the client is discharged.
Foods in one food group can be substituted for those in another group.
Answer the following statement true (T) or false (F)
A psychiatric–mental health nurse knows that crisis interventions must match the type of crisis that is being addressed. Which of the following events would be characterized as a maturational (developmental) crisis?
A) Residents of a rural, coastal town have seen their community devastated by a hurricane. B) A child is traumatized after witnessing the death of his brother in a farm accident. C) An ex-soldier has developed post-traumatic stress disorder after returning home. D) A man and woman are finding the transition to having their first baby profoundly stressful.