Question:
Gas exchange between blood and cell is known as.
Gas exchange between blood and cell is known as.
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Remember the designations:
- External = Exchange between Alveoli $\leftrightarrow$ Blood.
- Internal = Exchange between Blood $\leftrightarrow$ Body Cells.
- External = Exchange between Alveoli $\leftrightarrow$ Blood.
- Internal = Exchange between Blood $\leftrightarrow$ Body Cells.
Updated On: Jul 8, 2026
- External respiration
- Gas transport
- Internal respiration
- Pulmonary ventilation
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Respiration is a multi-step physiological process divided into pulmonary ventilation, transport of gases, and distinct phases of cellular gas exchange.
Step 3: Detailed Explanation:
- Pulmonary ventilation: The physical movement of air into and out of the lungs.
- External respiration: The diffusion of oxygen and carbon dioxide between the lung alveoli and the pulmonary capillaries.
- Gas transport: The movement of oxygen and carbon dioxide within the cardiovascular system.
- Internal respiration: The diffusion of oxygen out of the systemic blood capillaries into tissue cells, and the simultaneous transfer of metabolic carbon dioxide from tissue cells into the blood.
Step 4: Final Answer
The exchange of gases occurring between systemic blood and tissue cells is defined as internal respiration.
Respiration is a multi-step physiological process divided into pulmonary ventilation, transport of gases, and distinct phases of cellular gas exchange.
Step 3: Detailed Explanation:
- Pulmonary ventilation: The physical movement of air into and out of the lungs.
- External respiration: The diffusion of oxygen and carbon dioxide between the lung alveoli and the pulmonary capillaries.
- Gas transport: The movement of oxygen and carbon dioxide within the cardiovascular system.
- Internal respiration: The diffusion of oxygen out of the systemic blood capillaries into tissue cells, and the simultaneous transfer of metabolic carbon dioxide from tissue cells into the blood.
Step 4: Final Answer
The exchange of gases occurring between systemic blood and tissue cells is defined as internal respiration.
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