Veterinary Technician Practice Exam

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Cyanosis is associated with which color that indicates low oxygen in the blood?

  1. Red

  2. Yellow

  3. Blue

  4. Green

The correct answer is: Blue

Cyanosis is the term used to describe a bluish coloration of the skin and mucous membranes, which occurs as a result of low oxygen levels in the blood. When hemoglobin in the blood does not bind effectively to oxygen, it may appear blue through the skin, indicating that the tissues are not receiving adequate oxygenation. This is particularly noticeable in areas with thin skin, such as the lips and fingertips. The other color options do not relate to low oxygen saturation. Red typically indicates oxygen-rich blood, which is why arterial blood appears bright red due to its high oxygen content. Yellow can be associated with conditions like jaundice rather than oxygen levels, while green does not represent any specific indication related to blood oxygenation and may instead be seen in cases of certain infections or conditions.

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