Multiple choice

When exchange of gases occurs between blood and tissue fluid, it is called _____.

  1. external respiration

  2. tissue respiration

  3. cellular respiration

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cellular (internal) respiration refers to gas exchange between blood and tissue fluid, where oxygen diffuses from blood into tissues and carbon dioxide moves from tissues into blood. External respiration is lung alveoli-capillary exchange. Tissue respiration is cellular metabolic processes. Option C accurately describes blood-tissue fluid gas exchange.

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