PATHOLOGY

PATHOLOGY MCQ

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
-70 mV is a neuron’s
A
refractory period
B
hyperpolarization
C
resting membrane potential
D
threshold potential
Explanation: 

Detailed explanation-1: -The resting membrane potential of a neuron is about-70 mV (mV=millivolt)-this means that the inside of the neuron is 70 mV less than the outside. At rest, there are relatively more sodium ions outside the neuron and more potassium ions inside that neuron.

Detailed explanation-2: -The resting potential is a measure of a cell’s membrane potential when the pumping of ions into the cell is balanced by the flow of ions out of the cell. The resting membrane potential of a neuron is approximately-70 mV. This measurement is the difference in voltage inside the cell relative to the outside of the cell.

Detailed explanation-3: -The resting membrane potential (electrochemical equilibrium) is typically –70 mV on the inside.

There is 1 question to complete.