In Amphibians, Why Does the Reabsorption of NaCl Depend on the Permeability

question 31

Multiple Choice

In amphibians, why does the reabsorption of NaCl depend on the permeability of the tubule wall to water?

• A) Water movement allows the ATP to function more effectively.
• B) Water movement creates the concentration gradient for Cl to move passively.
• C) Water permeability allows the solutes to move more effectively.
• D) Water must move first before any of the solutes can move.

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Definitions:

Variable Cost

Costs that change in proportion to the level of output or activity in a business.

Fixed Costs

Costs that do not vary in proportion to the level of goods or services produced by a business, such as rent, salaries, and insurance premiums.

Operating Leverage

Operating Leverage is a measure of how revenue growth translates into growth in operating income, determined by the proportion of fixed versus variable costs a company has.

Variable Cost

Operational expenses of a business that alter in accordance with the level of activity.