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Neural Control and Coordination question

2008 · Q13
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Neural Control and Coordination question

2008 · Q13

NEETBiologyNeural Control and CoordinationMCQ+4 / −1
During the propagation of a nerve impulse, the action potential results from the movement of
  1. A
    K+ ions from intracellular fluid to extracellular fluid
  2. B
    Na+ ions from extracellular fluid to intracellular fluid
  3. C
    K+ ions from extracellular fluid to extracellular fluid
  4. D
    Na+ ions from intracellular fluid to extracellular fluid.
View written solutionFree

Correct answer: B

Total sum of physio-electrochemical changes that takes place along the length of nerve fibre is known as nerve impulse.
Change in potential due to stimulation of nerve fibre is called action potential. During propagation of nerve impulse, Na+ enters inside so ( +ve) charge is formed inside the membrane. K+ ions come out.

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