Scenario Yawning Is a Reflexive Action That Is Often Associated with with Sleepiness

question 46

Multiple Choice

Scenario
Yawning is a reflexive action that is often associated with sleepiness. When a person yawns, the mouth opens, and a longer than normal breath of air is inhaled, followed by a longer than normal exhalation. Hypothesizing that yawning has a regulatory mechanism similar to breathing, scientists conducted an experiment on college students to test the effect of existing carbon dioxide levels on yawning.
-Yawning uses the same muscles as regular breathing. When a person exhales to complete a yawn, what happens?

• A)The rib muscles contract.
• B)The diaphragm contracts.
• C)The rib muscles act in the same way that they do in an inhalation.
• D)The diaphragm relaxes.

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Definitions:

Added Profit

The additional profit generated from an activity or investment beyond the usual or expected return.

Expected-Rate-of-Return-Curve

A graphical representation that shows the relationship between the expected return on investment and the level of investment risk.

Law of Diminishing Returns

A principle stating that as investment in a particular area increases, the rate of profit from that investment, after a certain point, cannot continue to increase if other variables remain at a constant.

Retained Earnings

Profits that a company keeps after dividends are paid, often used for reinvestment, paying off debt, or building reserves.