What Causes the Rapid Depolarization Phase of a Contractile Cell

question 56

Multiple Choice

What causes the rapid depolarization phase of a contractile cell action potential?

• A) sodium movement into the cell
• B) calcium movement into the cell
• C) potassium movement into the cell
• D) calcium movement out of the cell
• E) sodium movement out of the cell

---

Definitions:

Dumping

In international trade, the practice of exporting goods at prices lower than the home market prices, often considered unfair competition.

Gray Market

The trade of a commodity through distribution channels that are legal but unintended by the original manufacturer.

Unauthorized Channels of Distribution

Routes to market that are not approved or sanctioned by the original manufacturer or trademark owner, often leading to grey market activities.

Haggling

The act of negotiating the price of a good or service between the buyer and seller, with the intent to agree on a lower price than initially offered.