A teaching nurse asks the students about how drugs activate receptors. One of the students correctly states that, "Drugs that increase receptor activation are those that
a. produce an effect equivalent to that produced by the natural neurotransmitter."
b. antagonize any natural neurotransmitters in the synapse."
c. promote the use of excess transmitters to down-regulate activation."
d. lack any effect at the synaptic cleft."
A
Activation is defined as an effect on receptor function equivalent to that produced by the natural neurotransmitter at a particular synapse, therefore drugs that increase receptor activation would have the same response.
Drugs that increase receptor activation do not antagonize any natural neurotransmitter in the synapse; this would be an inhibitory action.
Drugs that increase receptor activation do not promote the use of excess transmitter to down-regulate activation.
Drugs that increase receptor activation do not lack any effect at the synaptic cleft.
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