NEET PG DENTAL EXAM

EMBRYOLOGY

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The neuron’s resting potential is around how many mV?
A
25
B
-25
C
-70
D
-55
Explanation: 

Detailed explanation-1: -A neuron at rest is negatively charged: the inside of a cell is approximately 70 millivolts more negative than the outside (−70 mV, note that this number varies by neuron type and by species).

Detailed explanation-2: -A resting neuron is polarized at a membrane potential of-70mV, with greater negative charge inside. When there is a change in the membrane potential with the inside becoming more positive, the neuron is depolarized.

Detailed explanation-3: -Resting membrane potential of a neuron is about-70mV which means that the inside of the neuron is 70mV less than the outside. There are more k and less NA+ inside and more NA+ and less K+ outside.

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