Biology Nervous Coordination ETEA 2022
PMDC Verified Question 59 of 86
The resting membrane potential of neuron is measured about:
A
-30 millivolts
B
50 millivolts
C
-70 millivolts
D
100 millivolts
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: -70 millivolts
Concept:

When a neuron is not transmitting a signal, there is a stable, uneven distribution of ions across its membrane.

Solution:

  • The interior of a typical resting neuron is negatively charged relative to the exterior. This difference in electrical charge is the resting membrane potential, globally accepted to be approximately -70 millivolts (mV).


Why other options are incorrect:

  • -30 mV: Incorrect resting value.


  • +50 mV: Represents the peak of an active action potential.


  • 100 mV: Not a physiological resting state for human neurons.

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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