ANIMAL PHYSIOLOGY
GAS EXCHANGE IN HUMANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It encourages the development of COPD
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It increases the risk of lung cancer
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It damages the cilia which cannot remove mucus and therefore pathogens from the lungs
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It reduces the amount of oxygen carried by the red blood cells’ haemoglobin
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Detailed explanation-1: -Tobacco smoking may also lead to deranged morphology of red blood cells (RBCs), which results in reduced oxygen carrying capacity of the blood.
Detailed explanation-2: -Red blood cells transport oxygen around your body, but when you smoke, carbon monoxide takes some of the oxygen’s place. When blood cells carry carbon monoxide they can’t carry oxygen.
Detailed explanation-3: -Carbon monoxide binds hemoglobin, the molecule in your blood that carries oxygen. When carbon monoxide is bound to hemoglobin, oxygen cannot bind. This decreases the amount of oxygen delivered to all of your cells.
Detailed explanation-4: -Increased number of erythrocytes and values of hematocrit in male smokers can be explained by the fact that tissue hypoxia caused by increased creation of carboxy hemoglobin leads to an increased secretion of erythropoietin, thus increasing erythropoiesis.