Establishing a H⁺ Concentration Gradient Across the Cell Membrane

question 247

Multiple Choice

Establishing a H⁺ concentration gradient across the cell membrane

• A) enables K⁺ ions to enter the cell via active transport.
• B) prevents Cl⁺ ions from entering the cell.
• C) enables certain cations to enter the cell moving against their concentration gradient.
• D) facilitates the flow of water into the cell.
• E) is important for reducing the acidity level within the cells.

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Definitions:

Annual Profit

The net income a company earns over a fiscal year, after subtracting all expenses, taxes, and costs from total revenue.

Contribution Margin Ratio

The percentage of each sales dollar remaining after deducting variable costs, used to cover fixed costs and profit.

Margin Of Safety

The difference between actual or expected sales and the break-even point, expressing the level of sales fall that can be tolerated before a loss occurs.

Contribution Margin Ratio

The percentage of sales revenue that exceeds variable costs, representing how much revenue contributes towards covering fixed costs and generating profit.