NEET 2000 · Class 11

Neural Control and Coordination

The movement of ions against the concentration gradient will be

  1. (A)active transport
  2. (B)osmosis
  3. (C)diffusion
  4. (D)all of the above

The NCERT line that answers it

Verbatim line

These ionic gradients across the resting membrane are maintained by the active transport of ions by the sodium-potassium pump which transports 3 $Na^+$ outwards for 2 $K^+$ into the cell.

Chapter
Neural Control and Coordination
Section
18.3.1 Generation and Conduction of Nerve Impulse
Page
2
Words matched
30 of 30

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

5, emb=0.6713, combined=0.6028). Verified: high — The span explicitly states that ionic gradients are maintained by 'active transport of ions by the sodium-potassium pump', which directly matches the MCQ's correct answer about movement against concentration gradient.

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