A - Smoking increases O_2 content in blood.R | vedclass

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Question

(D) Smoking releases carbon monoxide $(CO)$ into the blood,which binds to hemoglobin with a much higher affinity than $O_2$,forming carboxyhemoglobin.

Vedclass · Accepted Answer

$A$ is incorrect,$R$ is correct.

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(D) Smoking releases carbon monoxide $(CO)$ into the blood,which binds to hemoglobin with a much higher affinity than $O_2$,forming carboxyhemoglobin. This reduces the oxygen-carrying capacity of the blood,making statement $A$ incorrect.Nicotine,a chemical found in tobacco,stimulates the adrenal glands to release adrenaline and noradrenaline into the blood,which increases blood pressure and heart rate. Thus,statement $R$ is correct.Therefore,$A$ is incorrect and $R$ is correct.

$A$ - Smoking increases $O_2$ content in blood.
$R$ - Nicotine stimulates the adrenal gland.

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$A$ - Smoking increases $O_2$ content in blood.$R$ - Nicotine stimulates the adrenal gland.