Neurotransmitters

Which of the following is the primary neurotransmitter involved in neuromuscular junctions?

• Dopamine

• Acetylcholine

• Serotonin

• GABA

What is the role of acetylcholine in the central nervous system?

• Inhibitory neurotransmitter

• Excitatory neurotransmitter

• Both inhibitory and excitatory

• None of the above

Which neurotransmitter is primarily associated with mood regulation?

• Dopamine

• Serotonin

• Norepinephrine

• GABA

What is the function of GABA in the nervous system?

• Promotes muscle contraction

• Inhibits neuronal activity

• Enhances memory formation

• Regulates sleep cycles

Which enzyme is responsible for breaking down acetylcholine in the synaptic cleft?

• Monoamine oxidase (MAO)

• Acetylcholinesterase

• Catechol-O-methyltransferase (COMT)

• Tyrosine hydroxylase

Which neurotransmitter is often linked to the reward system in the brain?

• Serotonin

• Dopamine

• Glutamate

• Norepinephrine

What is the primary function of norepinephrine in the body?

• Regulates sleep

• Increases heart rate

• Inhibits pain

• Enhances memory

Which neurotransmitter is primarily involved in the modulation of anxiety?

• Serotonin

• Dopamine

• GABA

• Acetylcholine

Which of the following is NOT a neurotransmitter?

• GABA

• Acetylcholine

• Insulin

• Nitric oxide