Biology Nervous Coordination SZABMU 2022
PMDC Verified Question 55 of 86
Which axon would transmit an action potential most rapidly?
A
1 mm diameter neuron lacking myelin
B
1 mm diameter neuron with myelin
C
2 mm diameter neuron lacking myelin
D
2 mm diameter neuron with myelin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: 2 mm diameter neuron with myelin
Concept: Factors influencing nerve conduction velocity.

Solution: Conduction speed increases with larger axon diameter and myelination. Myelination enables rapid saltatory conduction across nodes of Ranvier.

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.

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.