Carrier-Mediated Transport Is Necessary When

question 59

Multiple Choice

Carrier-mediated transport is necessary when

• A) diffusion will not allow adequate amounts of a substance to enter the cell.
• B) movement into the cell is against a concentration gradient.
• C) the level of nutrients in nature is very low.
• D) nutrient concentration is very low in the environment, is higher inside of the cell, or diffusion is not possible.

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Definitions:

Disposable Income

The economic resources households are left with for spending and saving after income tax charges.

Autonomous Consumption

The level of consumption that occurs when income levels are zero, reflecting basic consumption needs that do not depend on income.

Autonomous Consumption

Autonomous consumption is the level of consumption that occurs when income levels are zero, reflecting the basic level of consumption that is needed for survival.

Disposable Income

Post-tax disposable income that households can allocate for spending and saving.