The exchange of oxygen and carbon dioxide, at the cellular level or in the lungs, is called:

A. breathing.
B. respiration.
C. ventilation,
D. oxygenation.


Answer: B. respiration.

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Nicotinamide is also known as:

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Boyle's law states that:

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Utilization statistics show that a person uses the most care in the last ________ months of life

A) 24 B) 12 C) 6 D) 3

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