Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone?
A) acetylcholine
B) nitric oxide
C) serotonin
D) endorphin
Correct Answer:
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Q8: A second nerve impulse cannot be generated
Q9: What does the central nervous system use
Q10: What is the role of acetylcholinesterase?
A) stimulate
Q11: When a sensory neuron is excited by
Q12: Which of the following is not a
Q14: Which of the following is an excitatory
Q15: The substance released at axon terminals to
Q16: Which of the following is not true
Q17: Which of the following is true about
Q18: If a motor neuron in the body
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