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KVPY Sample Paper KVPY Stream-SX Model Paper-2

  • question_answer
    Certain nerve gases developed for military purposes work by producing convulsive muscular contractions upon the slightest stimulation. This suggests that their function is to inhibit the action of

    A) acetylcholine                 

    B) atropine

    C) cholinesterase    

    D) serine

    Correct Answer: A

    Solution :

    [a] Acetylcholine released from an excited terminal axon, depolarises the membrane and is then very rapidly inactivated by the enzyme cholinesterase, which is present in great concentrations in the neuromuscular junction. The inhibition of cholinesterase will result in the muscle being unable to restore the state of polarisation.


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