What Best Explains the Double-Headed Arrows Associated with Carbon Dioxide

question 28

Multiple Choice

What best explains the double-headed arrows associated with carbon dioxide and molecular oxygen shown in the following illustration?

• A) Individual molecules are unable to cross the membrane, but they can be found in relatively large numbers on both sides.
• B) The membrane is permeable to these small molecules and they enter or leave rapidly as their concentration gradients change.
• C) An isotonic condition exists for each molecule, so no net movement takes place.
• D) Homeostasis requires that surplus molecules entering the cell be rejected and returned to the outside.

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Definitions:

Standard Costs

Predetermined costs for the production of goods or services, used as benchmarks to measure actual performance and manage costs.

Actual Costs

Actual costs are the genuine expenditures incurred by a company, as opposed to estimated costs, during a given period for production, services, or other activities.

Reasonableness

A test or criterion to evaluate whether the assumptions or outputs of a financial model or decision are logical and align with real-world expectations.

Standard Costs

Predetermined costs for the production of goods or services, used as benchmarks against which actual costs are compared.