Drugs and the nervous system Quiz
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5 questions, one answer each
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1. Which drug mimics acetylcholine?
- A. Lidocaine
- B. Cobra venom toxin
- C. Nicotine
- D. Acetylcholinesterase
2. What is the primary action of lidocaine?
- A. Blocking voltage-gated Na⁺ channels
- B. Blocking acetylcholine receptors
- C. Mimicking acetylcholine
- D. Increasing the release of transmitter
3. Which statement about cobra venom is correct?
- A. It opens Na⁺ channels permanently
- B. It blocks acetylcholine receptors on the postsynaptic membrane
- C. It stops Ca²⁺ entering the axon
- D. It blocks the sodium-potassium pump
4. Why does a nicotine effect last longer than acetylcholine?
- A. It is released from more vesicles
- B. It reduces the amount of acetylcholinesterase made
- C. It increases Ca²⁺ entry
- D. It is not hydrolysed by acetylcholinesterase
5. Acetylcholine applied to a neuromuscular junction causes contraction after a drug was added to the axon. What does this show?
- A. The receptors are blocked
- B. The drug acts before the receptors
- C. The drug is nicotine
- D. The muscle is damaged