Resting Potential and Membrane Polarization — NEET Biology
📚 Practice ConceptThe electrical potential difference across the resting plasma membrane is called as the resting potential.
Which of the following statements regarding the generation and conduction of a nerve impulse are correct? S1: During resting potential, the axonal membrane is comparatively more permeable to potassium ions (K+) and nearly impermeable to sodium ions (Na+). S2: The active transport of ions by the sodium-potassium pump maintains the resting potential by transporting 3 Na+ inwards for 2 K+ outwards. S3: The rapid influx of Na+ ions across the stimulated membrane leads to the reversal of polarity, where the inner surface becomes positively charged. S4: The electrical potential difference across the resting plasma membrane is termed action potential. S5: Repolarisation occurs due to the rapid efflux of K+ ions, which restores the resting potential of the membrane.
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