During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?

First negative, then positive and again back to negative.

First positive, then negative and continue to be negative

First negative, then positive and continue to be positive

First positive, then negative and again back to positive

Neural Control and Coordination PYQ — NEET 2007 · Q15 with Solution

View written solutionFree

Correct answer: D

Once the events of depolarization have occurred, a nerve impulse or spike is initiated. Action potential is another name of nerve impulse. It lasts for about 1 msec (millisecond). The stimulalted, negatively charged point on the outside of the membrane sends out an electrical current to the positive point (still polarized adjacent to it). This local current causes the adjacent inner part of the membrane to reverse its potential from –70 mV to +30 mV. The reversal repeats itself over and over until the nerve impulse is conducted through the length of the neuron.

Neural Control and Coordination question

Neural Control and Coordination question

More from Neural Control and Coordination

Neural Control and Coordination question

Neural Control and Coordination question

More from Neural Control and Coordination