Ions Can Move Across the Plasma Membrane in Which of the Following

question 99

Multiple Choice

Ions can move across the plasma membrane in which of the following ways?

• A) through voltage-gated channels as in the action potential
• B) through passive or leak channels
• C) by ATP-dependent ion pumps like the sodium-potassium exchange pump
• D) through chemically gated channels as in neuromuscular transmission
• E) All of the answers are correct.

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Definitions:

Break-Even Sales

The amount of revenue from sales that equals the sum of the fixed and variable costs of production, resulting in zero net profit or loss.

Fixed Costs

Expenses that do not change with the level of production or sales activities within a certain range.

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Costs that vary directly with the level of production or volume of goods and services produced.

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