Question

cyanosis is caused by an increased blood concentration of

multiple choice

carbon monoxide

oxyhemoglobin

carbon dioxide

deoxyhemoglobin

Explanation:

Cyanosis is a bluish - discoloration of the skin and mucous membranes. It occurs when there is an increased concentration of deoxyhemoglobin (unoxygenated hemoglobin) in the blood. Deoxyhemoglobin absorbs more red light and reflects more blue light, giving the tissues a blue appearance. Carbon monoxide binds to hemoglobin and causes carbon monoxide poisoning, not cyanosis. Oxyhemoglobin is the oxygen - bound form of hemoglobin and its increase does not cause cyanosis. Carbon dioxide is transported in the blood in various forms and an increase in its concentration does not directly cause the characteristic bluish color of cyanosis.

Answer:

D. deoxyhemoglobin