Which of the Following Factors of the Internal Environment Is

question 27

Multiple Choice

Which of the following factors of the internal environment is not homeostatically maintained?

• A) its concentration of nutrient molecules.
• B) its concentration of nitrogen gas, of which 80% of the atmospheric air is composed.
• C) its concentration of oxygen and carbon dioxide.
• D) its pH.
• E) its temperature.

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Definitions:

Muscles

Tissues in the body made up of fibers that contract to produce movement or maintain posture.

Energy of Activation

The minimum amount of energy required to start a chemical reaction.

Metabolic Pathway

A series of chemical reactions occurring within a cell that leads to the conversion of one substance into another, often resulting in the production of energy or cellular components.

Reactant

A substance that takes part in and undergoes change during a reaction in a chemical process.