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🔬 Biology  ·  Neural Control and Coordination  ·  NEET

The enzyme that breaks down acetylcholine in the synaptic cleft to end the signal is:

Answer: Acetylcholinesterase.

  • A Salivary amylase
  • B Gastric pepsin
  • C Pancreatic lipase
  • D Acetylcholinesterase

Correct answer: D. Acetylcholinesterase

Explanation: Acetylcholinesterase quickly hydrolyses acetylcholine, stopping the signal so the synapse can reset.

Labeled diagram of a neuron showing dendrites, cell body (soma) with nucleus, axon, myelin sheath, Nodes of Ranvier, and axon terminals

Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.

Concept context

Brain, spinal cord, neurons, reflex arcs, and sense organs.

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