HISTOLOGY
NERVOUS TISSUE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
sodium ions rushing into the cell making the inside of cell more positive
|
|
|
potassium ions rushing out of the cell making the inside of cell less positive
|
|
|
release of Ach by the synapse making the inside of cell less positive
|
|
|
saltatory conduction making resting membrane potential to-55mV
|
Detailed explanation-1: -As the sodium ions rush back into the cell, they add positive charge to the cell interior, and change the membrane potential from negative to positive. Once the interior of the cell becomes more positively charged, depolarization of the cell is complete, and the channels close again.
Detailed explanation-2: -After being depolarized, a cell’s inherent charge changes one last time. The voltage-gated sodium ion channels that were open throughout the depolarization process in the cell shut once more after depolarization. The potassium channels now open as a result of the cell’s increased positive charge.
Detailed explanation-3: -The resting potential is the state of the membrane at a voltage of −70 mV, so the sodium cation entering the cell will cause it to become less negative. This is known as depolarization, meaning the membrane potential moves toward zero.