MDCAT Biology MCQ #2468

A doctor taps the patellar tendon of a patient, causing an immediate leg extension. This specific reflex arc is unique because it lacks interneurons.

MDCAT Biology MCQ #2468

  1. Question 1

    Q1. A doctor taps the patellar tendon of a patient, causing an immediate leg extension. This specific reflex arc is unique because it lacks interneurons.

    • A) Monosynaptic reflex
    • B) Polysynaptic reflex
    • C) Autonomic reflex
    • D) Conditional reflex

    Answer: Monosynaptic reflex

    Explanation: The knee-jerk reflex is the only monosynaptic human reflex; polysynaptic is tempting because almost every other reflex involves at least one interneuron.