If you were to insert a microelectrode through the cell membrane of a neuron, you would be able to demonstrate that
A) the region inside the cell membrane contains more positive ions than the region outside the membrane.
B) the region inside the cell membrane contains more negative ions than the region outside the membrane.
C) there is a greater concentration of potassium ions outside the cell membrane than inside the membrane.
D) there is a greater concentration of potassium ions inside the cell membrane than outside the membrane.

Question

Quizplus · Accepted Answer

The region inside the cell membrane contains more negative ions than the region outside the membrane. This is because the cell membrane is selectively permeable, allowing some ions to pass through more easily than others. Potassium ions are more concentrated inside the cell than outside, and chloride ions are more concentrated outside the cell than inside. This creates a difference in electrical charge across the cell membrane, with the inside of the cell being negative relative to the outside.

If You Were to Insert a Microelectrode Through the Cell