Examlex
Which of the following words refers to the primary lesion in syphilis?
Stimulants
A class of drugs that increase brain activity, leading to increased alertness, attention, and energy.
Dopamine
A neurotransmitter involved in many functions, including mood regulation, motivation, and reward.
Gastric Acid
A digestive fluid formed in the stomach, consisting mainly of hydrochloric acid and enzymes that break down food particles.
Neurotransmitter
Chemical messengers released from neurons to transmit signals across synapses to other neurons or cells.
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