When Potassium Ion Channels Open, Which of the Following Occurs

question 35

Multiple Choice

When potassium ion channels open, which of the following occurs?

• A)potassium ions flow into the axon cytoplasm
• B)the axon cytoplasm becomes more negatively charged
• C)sodium ions diffuse into the axon cytoplasm
• D)the threshold potential is reached
• E)more sodium channels open

---

Definitions:

Perfectly Competitive Market

A market structure characterized by an infinite number of buyers and sellers, identical products, no barriers to entry or exit, and perfect information among all participants.

Short-run Industry

A period in which at least one factor of production is fixed, and firms can only partially adjust their production levels.

Game-day T-shirts

Merchandise specifically designed and sold for sporting events, often featuring team logos or slogans to support the team.

Perfectly Competitive Market

A market structure characterized by many buyers and sellers, free entry and exit, homogenous products, and perfect information.