Question

nervous system fq
question 10 (1 point)
many drugs produce effects on the body by interfering with the functions of the
following are four examples:

• amphetamine causes excessive release of excitatory neurotransmitters
• cocaine enhances the functioning of excitatory neurotransmitters by preventing inactivation.
• lsd makes ineffective the functioning of certain excitatory neurotransmitters
• valium increases the effectiveness of inhibitory neurotransmitters

the information indicates that all of these drugs
change the threshold of an axon
affect the synapses
inactivate the sodium/potassium pump
cause an increase in the size of the action potential

Explanation:

The question is about how drugs affect the nervous system. The examples given (amphetamine, cocaine, LSD, Valium) all act on synapses (either enhancing excitatory, preventing inactivation, inactivating excitatory, or enhancing inhibitory neurotransmissions). So the commonality is that these drugs affect the synapses. Let's analyze the options:

• "change the threshold of an axon": The examples don't focus on axon thresholds.
• "affect the synapses": This matches as all the drug actions described relate to synaptic function (neurotransmitter activity at synapses).
• "inactivate the sodium/potassium pump": The examples don't involve the ion pump.
• "cause an increase in the size of the action potential": The examples don't mention altering action potential size.

Answer:

The correct option is the one stating "affect the synapses" (the option text as per the choices, likely the second or third circle - based on the layout, the option "affect the synapses" is the correct choice).