Identify a Difference Between Direct-Acting and Indirect-Acting Cholinergic Drugs

question 23

Multiple Choice

Identify a difference between direct-acting and indirect-acting cholinergic drugs.

• A) Indirect-acting drugs bind to muscarinic receptors, whereas direct-acting drugs do not bind to any receptors.
• B) Direct-acting drugs inhibit the activity of the enzyme acetylcholinesterase, whereas indirect-acting drugs enhance the activity of acetylcholinesterase.
• C) Indirect-acting drugs increase cholinergic activity at all muscarinic and nicotinic receptors sites, whereas direct-acting drugs only increase cholinergic activity at the muscarinic receptor sites.
• D) Direct-acting drugs lead to an increase in the concentration of acetylcholine in the synaptic cleft of all cholinergic nerve endings, whereas indirect-acting drugs do not affect the concentration of acetylcholine in the synaptic cleft of cholinergic nerve endings.

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Definitions:

Inflation Rate

The annual rate at which the cost of goods and services rises within an economy, reflecting a growth in price levels over time.

Price Level

An indicator of the mean cost of goods and services within an economy at a particular moment.

Money-Supply Curve

A graphical representation showing the relationship between the quantity of money supplied and the interest rate.

Open-Market Sale

The selling of government securities in the open market to reduce the money supply and control inflation.