The Equilibrium Potential of K⁺ Ions in Nerve Cells Is

question 96

Multiple Choice

The equilibrium potential of K⁺ ions in nerve cells is about -90 mV. The membrane potential of typical nerve cells at rest is -70 mV. Therefore

• A) Increasing the permeability of a resting neuronal membrane to K⁺ will make the membrane potential more negative inside with respect to outside.
• B) In resting neurons, there is a net diffusion of K⁺ into the cell.
• C) changing the resting membrane potential of a neuron to -80 mV would increase K⁺ diffusion rate out of the cell.
• D) potassium is the only permanent ion at rest.
• E) there must be another permanent ion with an equilibrium potential more negative than -90 mV.

---

Definitions:

Cash Dividends

Payments made to shareholders out of a company's earnings, representing a share of the profits.

Originally Issued

Refers to securities or financial instruments that have been sold directly by the issuer to investors for the first time, not through secondary market transactions.

Retained Earnings

Retained earnings represent the cumulative amount of net income earned by a company that is kept within the company for reinvestment in its operations or to pay debt, rather than being paid out as dividends to shareholders.

Paid-In Capital

The complete sum of money and various assets that investors have provided to a corporation in return for its shares.