Zoology-(general)
NEET Zoology (general) MCQ Question
Type: MCQ-numerical-Hard-Class 11
If the resting potential of a neuron is -70 mV and a stimulus causes the membrane at a site to become freely permeable to Na+, leading to a rapid influx that reverses the polarity to +30 mV, what is the change in electrical potential difference at this site?
A
100 mV
B
40 mV
C
70 mV
D
30 mV
Correct Answer
Option A
Detailed Explanation
The change in potential difference is from -70 mV to +30 mV, which is a total change of 100 mV.
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