What happen during action potential to Na+ ions?
a) more Na+ ions entering
b) more Na+ ions are leaving
c) Na+ ions remains same at both side
d) Na+ ions not move
What is the electrical potential of the membrane during action potential?
a) 10 mV
b) 40mV
c) 50mV
d) 80mV
Explanation potential changes from -70 mV to zero and then to +50mV
The reversal of polarity from -70 to +50 mV across two side of membrane is called
a) polarization
b) activation
c) depolarization
d) discharge
Explanation depolarization or hypopolarization is a change within a cell, during which the cell undergoes a shift in electric charge distribution, resulting in less negative charge inside the cell compared to the outside.
The membrane potential adequate stimulus
a) 80
b) 50
c) 70
d) 40
After the peak of action potential, the permeability of membrane to which of the following decreases?
a) K+
b) Na+
c) Cl-
d) all of these
Explanation Na+ ions gates closed
After the peak of action potential, the permeability of membrane to which of the following increases?
a) K+
b) Na+
c) Cl-
d) all of these
Explanation it is due to opening of K+ gates
