Respiratory Gases, Such as O₂ and CO₂, Move Through the Cell

question 61

Multiple Choice

Respiratory gases, such as O₂ and CO₂, move through the cell membranes by

• A) simple diffusion
• B) carrier mediated facilitated diffusion
• C) channel mediated facilitated diffusion
• D) gas pumps

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Definitions:

Tertiary Aging

The progression of changes in an individual that are due to disease, rather than due to normal aging or genetics.

Lifespan

The length of time a living being, especially a human, exists from birth to death.

Healthy Life Expectancy

The average number of years that an individual is expected to live in a state of good health, subtracting years of ill health adjusted for severity.

Population Density

A measurement of the number of individuals living per unit area.