To Say That a Cell Is ʺSelectively Permeableʺ Means

question 41

Multiple Choice

To say that a cell is ʺselectively permeableʺ means

• A) sometimes water passes through, and sometimes it canʹt.
• B) it is permeable to different substances than other cells.
• C) only certain molecules can pass through.
• D) it has different-sized perforations in the membrane.
• E) permeability depends on gradient differences.

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Definitions:

Average Variable Cost

The variable cost (costs that change with production volume) divided by the quantity of output produced.

Marginal Cost

The increase or decrease in the total cost incurred by producing one additional unit of a product or service.

Total Variable Costs

The sum of expenses that vary directly with the level of output production.

Average Total Cost

The per unit cost of production, calculated by dividing total cost by the total quantity of output produced.