Biology Nervous Coordination KMU 2024
PMDC Verified Question 3 of 86
A reflex action does not involve the:
A
Sensory neuron
B
Motor neuron
C
Brain
D
Spinal cord
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Brain
Concept:

To achieve maximum speed and protect the body, emergency reflexes bypass higher-order cognitive processing.

Solution:

  • A standard spinal reflex arc travels from a sensory neuron, to the spinal cord (via an interneuron), directly to a motor neuron. It explicitly bypasses the brain to eliminate processing lag time, ensuring an immediate, involuntary muscular response.


Why other options are incorrect:

  • Spinal cord, Sensory neuron, Motor neuron: These are the mandatory structural components that comprise the actual spinal reflex arc.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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