HISTOLOGY
INTEGUMENTARY SYSTEM SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cyanosis is caused by
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altered blood flow to the skin (overall or in small areas).
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increased number of active melanocytes.
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collection of abnormal pigment (not melanin) in the skin.
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decreased oxygen content of blood.
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Explanation:
Detailed explanation-1: -Cyanosis is caused due to an absolute increase in the deoxygenated hemoglobin. Therefore, in anemic patients, greater desaturation of arterial hemoglobin is required for cyanosis to manifest, as compared to individuals with normal hemoglobin levels.
Detailed explanation-2: -Central cyanosis is caused by diseases of the heart or lungs or by abnormal haemoglobin types like methemoglobin or sulfhemoglobin etc. This is seen commonly as bluish or purple discoloration of tongue and linings of the mouth.
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