Nervous System: Neuron, Synapse, Reflexes · Zoology

Which of the following is an example of a Polysynaptic Reflex?

  1. Patellar reflex (knee-jerk), involving a single synapse
  2. Withdrawal reflex (pulling hand away from a hot stove)
  3. Stretch reflex mediated by muscle spindle afferents directly onto motor neurons
  4. Monosynaptic reflex involving one direct sensory-to-motor connection
Show answer and explanation

Correct answer: Withdrawal reflex (pulling hand away from a hot stove)

The withdrawal reflex involves at least one interneuron between the sensory and motor neurons. This allows for more complex processing, such as inhibiting the antagonistic muscle group (reciprocal inhibition).

Difficulty: Medium Question 17 of 20

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