Question

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

• amphetamines cause excessive release of excitatory neurotransmitters.
• cocaine enhances the functioning of excitatory neurotransmitters by preventing their 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 synapse
• inactivate the sodium/potassium pump
• cause an increase in the size of the action potential

Explanation:

To solve this, we analyze each option:

• Option "change the threshold of an axon": The examples given (amphetamines, cocaine, LSD, Valium) act on neurotransmitters at synapses, not axon thresholds.
• Option "affect the synapse": Amphetamines release excitatory neurotransmitters at synapses, cocaine prevents inactivation of excitatory neurotransmitters at synapses, LSD affects excitatory neurotransmitters at synapses, and Valium affects inhibitory neurotransmitters at synapses. All these drugs' actions are at the synapse level.
• Option "inactivate the sodium/potassium pump": The described drug actions don't relate to sodium - potassium pumps.
• Option "cause an increase in the size of the action potential": The examples involve neurotransmitter function, not altering action potential size.

So the correct option is the one about affecting the synapse.

Answer:

affect the synapse (the option corresponding to "affect the synapse")