Question

this kind of neurotransmitter, also called excitatory, speed up the message as it continues on. they are called ______. options: threshold, antagonist, agonist, reuptake

Explanation:

• Threshold refers to the minimum stimulus needed to trigger an action potential, not an excitatory neurotransmitter-related agent.
• Antagonists inhibit or block neurotransmitter activity, which slows signals, not speeds them.
• Agonists mimic or enhance the effect of excitatory neurotransmitters, speeding up neural message transmission, matching the description.
• Reuptake is the process of neurotransmitters being reabsorbed by the sending neuron, not an excitatory agent.

Answer:

agonist