#resting membrane potential

Membrane Transportation

Which of the following ATP-powered pumps is responsible for maintaining resting membrane potential?

Resting membrane potential stability essential for excitability maintained by differential permeability and active ion distribution. Key player is Na+/K+ ATPase, P-type ion pump encoded by ATP1A genes for alpha isoforms, ATP1B for beta, FXYD for gamma regulatory. Catalytic alpha subunit roughly 112 kDa with ten membrane spans contains nucleotide N domain binding ATP, phosphorylation P domain with conserved DKTGTLT aspartate that forms phosphoenzyme intermediate, actuator A domain and transmembrane ion binding pocket coordinating ions with carbonyl oxygens. Cycle Post-Albers: E1 high Na affinit

Ref: Skou and Glynn, P-Type ATPases Review, Na+/K+ ATPase Role in Resting Membrane Potential Maintenance.

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Sensory Organs - Ear - Structure and Physiology of Hearing and Balance

Which of the following is responsible for maintaining the resting membrane potential in neurons?

The sodium-potassium pump maintains the resting membrane potential by actively transporting Na⁺ out and K⁺ into the neuron.

Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance

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Central Nervous System - Spinal Cord Reflex Action and Reflex Arc

Which ion is mainly responsible for maintaining the resting membrane potential in neurons?

Potassium ions (K⁺) play a key role in maintaining the resting membrane potential by being more permeable than sodium ions.

Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Central Nervous System - Spinal Cord Reflex Action and Reflex Arc

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Action potential

Resting membrane potential of a typical neuron is approximately:

The correct answer is B: -70 mV. In Action potential, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, -70 mV is the option that correctly names the structure, process, or principle asked for in Action potential. That is why -70 mV is the option that holds up when you check it against basic physiology. When you revise, say the answer out loud with one short reason attached; that sticks better than rote lists. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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