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STD 11 - 18. Neural control and coordination — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 18. Neural control and coordination4 Marks
MCQ
The ionic gradients across the resting membrane are maintained by the
  • A
    Ion channels
  • ✓
    Sodium-potassium pumps
  • C
    Electrical synapses
  • D
    Chemical synapses
✓

Answer

Correct option: B.
Sodium-potassium pumps
b
The ionic gradients across the resting membrane is due to opening of $K^+$ leaky channels but is maintained because of $Na^+ \;K^+$ pump which continuously pump $3Na^+$ ions outwards in exchange of $2K^+$ inwards at the expense of energy.

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