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Physiology

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Respiration

Question
7 out of 33
 

Cyanosis doesn’t occur in Anemia because. (AIPG 2009)



A Certain min. amount of reduced Hb should be present

B In anemia, O2 saturation increases

C Hypoxia stimulates erythropoietin production

D O2 Hemoglobin curve shifts to right

Ans. A Certain min. amount of reduced Hb should be present.

I. Cyanosis is a blue colouration of the skin and mucous membranes due to the presence of > 5g/dl reduced hemoglobin in blood vessels near the skin surface. Now since in anemia the total amount of hemoglobin is decreased, the amount of reduced Hb to produce Cyanosis is not sufficient eg.

II. Suppose Hb is 8 gm% and 50% of Hb is reduced then we will have reduced Hb of 4 gm% and no cyanosis

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