What effect does carbon monoxide poisoning have on the oxygen dissociation curve?

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It leads to hypoxic hypoxiaIt causes a leftward shift of the oxygen dissociation curveIt results in cyanosisIt reduces the lung's diffusion capacityIt increases oxygen delivery to tissues

Explanation

Carbon monoxide binds to hemoglobin with high affinity, which causes the oxygen dissociation curve to shift to the left. This shift means hemoglobin holds oxygen more tightly, reducing oxygen release to tissues despite adequate oxygen levels in the blood.