Some Drugs Modulate the Activity of Ion Channels

question 31

Multiple Choice

Some drugs modulate the activity of ion channels. For example, Novocain somewhat inhibits the opening of sodium channels. What happens to the threshold of a sensory neuron if this drug is used?

• A) It will take less stimulation to reach threshold.
• B) It will take more stimulation to reach threshold.
• C) Threshold will not change.
• D) The nerve will not function and will die off.

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