If the Partial Pressure of Oxygen (PO₂) in a Man's

question 72

Multiple Choice

If the partial pressure of oxygen (pO₂) in a man's blood plasma decreased below that in his red blood cells, what would be the result?

• A)More oxygen would diffuse into his red blood cells and be transported throughout his body.
• B)Oxygen would diffuse out of his red blood cells, and less oxygen would be transported throughout his body.
• C)The concentration of oxygen would be the same in red blood cells and blood plasma.

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Definitions:

Positive Feedback

Mechanism of homeostatic response in which the output of the system intensifies and increases the activity of the system.

Negative Feedback

Mechanism of homeostatic response by which the output of a system suppresses or inhibits activity of the system.

Metabolic Rate

The rate at which energy is expended by the body to maintain basic physiological functions and to perform activities.

Thyroid

A gland in the neck that produces hormones regulating the body's metabolic rate as well as heart and digestive function, muscle control, brain development, and bone maintenance.