Cyanosis is caused by which condition?

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Study for the Galen Anatomy and Physiology (AandP) 1 Theory Exam 2. Gain confidence with flashcards, pinpoint areas needing focus, and strengthen understanding through detailed explanations. Excel in your exam with comprehensive preparation!

Multiple Choice

Cyanosis is caused by which condition?

Explanation:
Cyanosis reflects insufficient oxygen in the blood. When hemoglobin is not carrying much oxygen, it becomes deoxygenated and darker in color. This deoxygenated hemoglobin gives blood a bluish tint that can be seen in the skin and mucous membranes, especially where the tissue is thin (like lips, tongue, and nail beds). It’s the change in arterial blood oxygen content that produces cyanosis, not dehydration or bilirubin. Excess bilirubin causes jaundice (yellow), and dehydration or lactic acid buildup are not direct causes of the blue discoloration—though severe hypoxia can lead to more lactic acid production as a consequence of anaerobic metabolism.

Cyanosis reflects insufficient oxygen in the blood. When hemoglobin is not carrying much oxygen, it becomes deoxygenated and darker in color. This deoxygenated hemoglobin gives blood a bluish tint that can be seen in the skin and mucous membranes, especially where the tissue is thin (like lips, tongue, and nail beds). It’s the change in arterial blood oxygen content that produces cyanosis, not dehydration or bilirubin. Excess bilirubin causes jaundice (yellow), and dehydration or lactic acid buildup are not direct causes of the blue discoloration—though severe hypoxia can lead to more lactic acid production as a consequence of anaerobic metabolism.

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