sail_e_0_practice_paper_1662888579527496.jpg

Neural Control And Coordination


Depolarization of axolemma during nerve conduction takes place because _____.
Options:
A. Equal amount of Na+ and K+ move across the axolemma
B. Na+ ions move inside
C. More Na+ ions outside
D. More K+ ions outside

 Next Question
Answer: Option B
: B

Depolarization of a nerve cell membrane occurs during the passage of an action potential along the axon where the nerve is transmitting an impulse. During depolarization, the Voltage-gated Na+ channels open, and Na+ rush into the axon. Entry of sodium ions leads to depolarization (reversal of polarity) of the nerve membrane. This membrane depolarization causes the opening of voltage-gated K+channels, allowing K+ions to exit and repolarization of the membrane.

Submit Solution

Your email address will not be published. Required fields are marked *



sail_e_0_practice_paper_1662888579527496.jpg