MDCAT Biology MCQ #2447

A farm worker exposed to organophosphate pesticides shows muscle tremors and spasms due to inhibited acetylcholinesterase. What is the direct physiological result?

MDCAT Biology MCQ #2447

  1. Question 1

    Q1. A farm worker exposed to organophosphate pesticides shows muscle tremors and spasms due to inhibited acetylcholinesterase. What is the direct physiological result?

    • A) Inhibition of acetylcholine synthesis
    • B) Blocking of post-synaptic receptors
    • C) Continuous stimulation of the post-synaptic membrane
    • D) Prevention of calcium influx in pre-synaptic knob

    Answer: Continuous stimulation of the post-synaptic membrane

    Explanation: Acetylcholinesterase breaks down acetylcholine; its inhibition leads to continuous stimulation. Acetylcholine synthesis is incorrect as the neurotransmitter is already present.