PHYSIOLOGY
NEUROTRANSMISSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
-60-70 mV; action potential; more negative ions inside the cell
|
|
|
-70-100 mV; action potential; more positive ions inside the cell
|
|
|
-60-70mV; resting potential; more positive ions inside the cell
|
|
|
-60-70mV; resting potential; more negative ions inside the cell
|
Detailed explanation-1: -In most neurons this potential, called the membrane potential, is between −60 and −75 millivolts (mV; or thousandths of a volt; the minus sign indicates that the inner surface is negative). When the inside of the plasma membrane has a negative charge compared to the outside, the neuron is said to be polarized.
Detailed explanation-2: -When the neuronal membrane is at rest, the resting potential is negative due to the accumulation of more sodium ions outside the cell than potassium ions inside the cell.
Detailed explanation-3: -Also the membrane is impermeable to the negatively charged proteins on the inside of the cell. Due to this the inside of the cell is comparatively negative to the outside. Whereas the positive charge gets accumulated outside the axonal membrane of the neuron in the resting phase.