When a nerve fiber is polarized, the concentration(s) ofA. Na+ and K+ are higher on the inside of the membrane.B. Na+ is higher on the inside of the membrane and K+ is higher on the outside.C. Na+ is higher on the outside of the membrane and K+ is higher on the inside.D. Na+ and K+ are higher on the outside of the membrane.
C
C. Na+ is higher on the outside of the membrane and K+ is higher on the inside.
When a nerve fiber is polarized, it means that there is a difference in electrical charge across the cell membrane. This is due to the fact that the distribution of charged ions, such as sodium (Na+) and potassium (K+), is uneven across the membrane. Specifically, there are more sodium ions on the outside of the membrane and more potassium ions on the inside of the membrane. This results in the outside of the membrane having a positive charge and the inside having a negative charge, which creates an electrical potential for the nerve fiber to use in transmitting signals. Therefore, option C is the correct answer.
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