Oxygen Concentration Generally Plays an Important Role in Regulating Respiration

question 43

Multiple Choice

Oxygen concentration generally plays an important role in regulating respiration:

• A) all the time.
• B) never.
• C) only when the carbon dioxide concentration falls markedly.
• D) only when the oxygen concentration falls markedly.
• E) only when the pH falls markedly.

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Definitions:

Nucleus

A membrane-bound organelle found in eukaryotic cells, containing most of the cell's genetic material.

Smooth

A type of involuntary muscle tissue found in internal organs.

Walls

Structures designed to divide or enclose areas, commonly constructed from materials like brick, stone, or wood.

Organs

Structures composed of different tissues that perform specific functions within an organism, such as the heart, liver, or lungs.