Why Are Action Potentials Usually Conducted in One Direction

question 56

Multiple Choice

Why are action potentials usually conducted in one direction?

• A) The nodes of Ranvier conduct potentials in one direction.
• B) The brief refractory period prevents reopening of voltage-gated Na⁺ channels.
• C) The axon hillock has a higher membrane potential than the terminals of the axon.
• D) Ions can flow along the axon in only one direction.
• E) Voltage-gated channels for both Na⁺ and K⁺ open in only one direction.

---

Definitions:

Purchasing Power

The worth of a currency depicted by how much goods or services can be purchased with one unit of that currency.

Basket of Goods

A collection of products and services used as a constant sample for measuring changes in prices, often in the calculation of inflation.

CPI (Consumer Price Index)

An index that measures changes in the average price of consumer goods and services purchased by households over time.

Real Value

The value of an amount of money in terms of the goods and services it can buy, adjusted for inflation.