Q: The active transport of ions across the membrane causes an electrical gradient to build up across the what?


Read this paragraph and choose the correct option from the provided answers:

The active transport of ions across the membrane causes an electrical gradient to build up across the plasma membrane. The number of positively charged ions outside the cell is greater than the number of positively charged ions in the cytosol. This results in a relatively negative charge on the inside of the membrane, and a positive charge on the outside. This difference in charges causes a voltage across the membrane. Voltage is electrical potential energy that is caused by a separation of opposite charges, in this case across the membrane. The voltage across a membrane is called membrane potential . Membrane potential is very important for the conduction of electrical impulses along nerve cells.

 Choices:

- colloidal membrane

- components membrane

- cells membrane

- plasma membrane


A:
plasma membrane