For a Human to Inhale, the Rib Muscles and Diaphragm

question 31

Multiple Choice

For a human to inhale, the rib muscles and diaphragm must

• A) contract, decreasing the pressure inside the lungs.
• B) relax, raising the pressure inside the lungs.
• C) contract, raising the pressure inside the lungs.
• D) relax, decreasing the pressure inside the lungs.

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Definitions:

Contribution Margin Ratio

A financial metric that represents the portion of sales revenue that is not consumed by variable costs and can contribute to covering fixed costs.

Break-Even Point

The point at which total costs equal total revenue, resulting in no profit but also no loss.

Mixed Costs

Expenses that contain both variable and fixed cost elements, changing in total with the level of activity but not in direct proportion.

Direct Materials

Raw materials that are directly traceable and integral to the finished product in the manufacturing process.