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When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]
- a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
- b)equally permeable to both Na+ and K+ ions
- c)impermeable to both Na+ and K+ ions
- d)comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
When a neuron is in resting state I not conducting any impulse, the ax...
When a neurone is in resting state i.e., not conducting any impulse, the axonal membrane is comparatively more permeable to K+ ion and nearly impermeable to Na+ ions.
Most Upvoted Answer
When a neuron is in resting state I not conducting any impulse, the ax...
Resting State of a Neuron
When a neuron is in its resting state, it means it is not conducting any impulse or transmitting signals. This is the state of the neuron when it is at rest and not actively involved in transmitting information.
Axonal Membrane Permeability
The axonal membrane of a neuron is selectively permeable, meaning it allows certain ions to pass through while restricting the movement of others. The resting state membrane potential is primarily determined by the permeability of the axonal membrane to different ions, particularly sodium (Na+) and potassium (K+).
Membrane Permeability to Na+ and K+
During the resting state, the axonal membrane is comparatively more permeable to potassium ions (K+) and nearly impermeable to sodium ions (Na+). This means that K+ ions have an easier time crossing the membrane, while Na+ ions are largely restricted.
Explanation of Option D
Option D states that the axonal membrane is comparatively more permeable to K+ ions and nearly impermeable to Na+ ions during the resting state. This is the correct answer because it accurately reflects the membrane permeability during this state.
Importance of Potassium (K+)
The resting membrane potential of a neuron is primarily determined by the movement of K+ ions. At rest, there is a higher concentration of K+ ions inside the neuron compared to the outside. As K+ ions move out of the neuron through the axonal membrane, they create a negative charge inside the neuron, resulting in a resting membrane potential.
Limited Permeability of Sodium (Na+)
During the resting state, the axonal membrane is nearly impermeable to Na+ ions. This limited permeability to Na+ is crucial for maintaining the resting state and preventing the influx of positive charge into the neuron. If the membrane were more permeable to Na+ ions, it could disrupt the resting membrane potential and lead to the initiation of an action potential.
Summary
In summary, when a neuron is in its resting state, the axonal membrane is comparatively more permeable to K+ ions and nearly impermeable to Na+ ions. This selective permeability allows for the maintenance of the resting membrane potential and prepares the neuron for the transmission of electrical signals.
When a neuron is in its resting state, it means it is not conducting any impulse or transmitting signals. This is the state of the neuron when it is at rest and not actively involved in transmitting information.
Axonal Membrane Permeability
The axonal membrane of a neuron is selectively permeable, meaning it allows certain ions to pass through while restricting the movement of others. The resting state membrane potential is primarily determined by the permeability of the axonal membrane to different ions, particularly sodium (Na+) and potassium (K+).
Membrane Permeability to Na+ and K+
During the resting state, the axonal membrane is comparatively more permeable to potassium ions (K+) and nearly impermeable to sodium ions (Na+). This means that K+ ions have an easier time crossing the membrane, while Na+ ions are largely restricted.
Explanation of Option D
Option D states that the axonal membrane is comparatively more permeable to K+ ions and nearly impermeable to Na+ ions during the resting state. This is the correct answer because it accurately reflects the membrane permeability during this state.
Importance of Potassium (K+)
The resting membrane potential of a neuron is primarily determined by the movement of K+ ions. At rest, there is a higher concentration of K+ ions inside the neuron compared to the outside. As K+ ions move out of the neuron through the axonal membrane, they create a negative charge inside the neuron, resulting in a resting membrane potential.
Limited Permeability of Sodium (Na+)
During the resting state, the axonal membrane is nearly impermeable to Na+ ions. This limited permeability to Na+ is crucial for maintaining the resting state and preventing the influx of positive charge into the neuron. If the membrane were more permeable to Na+ ions, it could disrupt the resting membrane potential and lead to the initiation of an action potential.
Summary
In summary, when a neuron is in its resting state, the axonal membrane is comparatively more permeable to K+ ions and nearly impermeable to Na+ ions. This selective permeability allows for the maintenance of the resting membrane potential and prepares the neuron for the transmission of electrical signals.
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When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer?.
When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When a neuron is in resting state I not conducting any impulse, the axonal membrane is: [2011]a)comparatively more permeable to Na+ ions and nearly impermeable to K+ ionsb)equally permeable to both Na+ and K+ ionsc)impermeable to both Na+ and K+ ionsd)comparatively more permeable to K+ ions and nearly impermeable to Na+ ionsCorrect answer is option 'D'. Can you explain this answer?.
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