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

question 67

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.
-What must be TRUE if yawning has a regulatory mechanism similar to breathing?

• A)Athletes should yawn more when exercising compared to when they are not exercising.
• B)Tibetan mountaineers yawn less when they are walking compared to when they are standing still.
• C)People adapted to lower altitudes should yawn the same amount when they are at high altitudes.
• D)Athletes who have trained at high altitudes should inhale a greater volume of air when yawning compared to those who have trained only at low altitudes.

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