Internal respiration occurs between which two components?

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Multiple Choice

Internal respiration occurs between which two components?

Internal respiration is the gas exchange that happens between the blood in the systemic capillaries and the body’s tissue cells. Oxygen moves from blood into tissues where it’s used by mitochondria to make ATP, while carbon dioxide, a metabolic waste, moves from tissues back into the blood to be carried to the lungs for exhalation. This contrasts with external respiration, which is the exchange of gases between air in the lungs and the blood, and with cellular respiration, which is the intracellular use of oxygen to produce energy. So the best description is the exchange occurring between blood and tissues.

Internal respiration is the gas exchange that happens between the blood in the systemic capillaries and the body’s tissue cells. Oxygen moves from blood into tissues where it’s used by mitochondria to make ATP, while carbon dioxide, a metabolic waste, moves from tissues back into the blood to be carried to the lungs for exhalation. This contrasts with external respiration, which is the exchange of gases between air in the lungs and the blood, and with cellular respiration, which is the intracellular use of oxygen to produce energy. So the best description is the exchange occurring between blood and tissues.

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