If the Sodium Ion Concentration Is 130 MM Outside and 12

question 45

Multiple Choice

If the sodium ion concentration is 130 mM outside and 12 mM in the cytoplasm, and sodium selective channels open with the membrane potential at +80 mV, which will occur?

• A) The net flux of sodium ions will be inward.
• B) The net flux of sodium ions will be outward.
• C) There will be no net flux of sodium ions-it will be equal in and out.
• D) There will be no movement of sodium ions across the membrane.
• E) Sodium channels will inactivate.

---

Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity demanded by consumers at those prices, typically downward sloping.

Total Revenue

The total income a firm receives from the sale of its products, calculated by multiplying price by quantity sold.

Price Falls

A situation where the market price of a good or service decreases due to factors such as increased supply or decreased demand.

Midpoint Formula

A method used in economics to calculate the elasticity of demand or supply by taking the average of the starting and ending prices and quantities.