Veterinary Technician Practice Exam

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What condition results from the lack of sufficient oxygen in the blood leading to a blue discoloration of the skin?

Cyanosis
Jaundice
Pallor
Cerumen

The correct answer is: Cyanosis

Cyanosis is the condition characterized by a bluish discoloration of the skin and mucous membranes due to insufficient oxygen levels in the blood. When the oxygen saturation in the bloodstream drops, it affects the hemoglobin, which is responsible for delivering oxygen throughout the body. The deoxygenated hemoglobin has a darker color, resulting in the noticeable blue tint on the skin. This clinical sign is often observed in conditions that impair oxygenation, such as respiratory diseases or circulatory issues. Other conditions listed do not relate to a lack of oxygen. Jaundice, for instance, is caused by an accumulation of bilirubin, leading to a yellowish discoloration of the skin. Pallor refers to an abnormal paleness of the skin, which may occur for various reasons, typically related to blood loss or shock but not specifically due to oxygen deprivation. Cerumen, on the other hand, is earwax and is not related to blood oxygen levels at all.