Q. Nerve impulse initiates with the movement of
A) $K^{+}$
B) $Na^{+}$
C) $Ca^{+}$
D) $Mg^{+}$
Explanation
In normal resting stage, nerve fibres are in the form of polarized stage with a resting membrane potential of -70 mV. When a nerve impulse travels through nerve fibre, depolarization takes place due to influx ($i.e.,$ inside movement) of $Na^{+}$ ion.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.