Oxygen delivery decreases when which of the following occur?
I. decline in cardiac output
II. decline in blood oxygenation
III. decline in carboxyhemoglobin
IV. decline in hemoglobin concentration

Question

Quizplus · Accepted Answer

Oxygen delivery to tissues is dependent on several factors including cardiac output, blood oxygenation, and hemoglobin concentration. A decline in cardiac output means less blood is being pumped through the body, reducing oxygen delivery. A decline in blood oxygenation means there is less oxygen available in the blood to be delivered. A decline in hemoglobin concentration means there is less of the molecule that carries oxygen in the blood, also reducing oxygen delivery. Decline in carboxyhemoglobin would actually potentially increase oxygen delivery, as carboxyhemoglobin (carbon monoxide bound to hemoglobin) reduces the amount of oxygen that can be carried by hemoglobin.

Oxygen Delivery Decreases When Which of the Following Occur