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KVPY Sample Paper KVPY Stream-SX Model Paper-21

  • question_answer
    During some surgical operations the drug curare. Which has a similar shape to acetylcholine is' injected into the muscles to relax them. Why do the muscles remain relaxed?

    A) Calcium ions cannot be taken up by membrane vesicless

    B) Cholinesterase cannot remove acetylcholine

    C) Post-synaptic membrane receptors are blocked

    D) Sodium channels remain open

    Correct Answer: C

    Solution :

    Acetylcholine is a neurotransmitter. It transmits message across the synapse (excitatory synapse). The drug curare blocks the post-synaptic membrane receptors, so that the muscles remain relaxed during surgical operations.


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