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NEET 2011
Exam
NEET
Year
2011
Subject
Zoology
Chapter
Neural Control and Coordination

NEET 2011 · Zoology · Neural Control and Coordination

When a neuron is an resting state, i e , not conducting any...

When a neuron is an resting state, iei e, not conducting any impulse, the axonal membrane is

Options

  1. Aequally permeable to both Na+\mathrm{Na}^{+}and K+\mathrm{K}^{+}ions
  2. Bimpermeable to both Na+\mathrm{Na}^{+}and K+\mathrm{K}^{+}ions
  3. Ccomparatively more permeable to K+\mathrm{K}^{+}ions and nearly impermeable to Na+\mathrm{Na}^{+}ions
  4. Dcomparatively more permeable to Na+\mathrm{Na}^{+}ions and nearly impermeable to K+\mathrm{K}^{+}ions

Correct answer

C. comparatively more permeable to K+\mathrm{K}^{+}ions and nearly impermeable to Na+\mathrm{Na}^{+}ions

Step-by-step solution

Neurons are excitable cells because their membrane are in a polarised state. Different types of selectively permeable channels are present on the neural membrane. When a neuron is not conducting any impulse, ie, resting, the axonal membrane is comparatively more permeable to potassium ion (K+)\left(\mathrm{K}^{+}\right)and nearly impermeable to sodium ion \left(\mathrm{Na}^{+}\right).
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