Nicotine is an alkaloid that enters the body | vedclass

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(A) Nicotine is a stimulant drug found in tobacco smoke. Its effects are as follows:$(i)$ It stimulates the adrenal gland to release adrenaline and no

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$4$

Vedclass · Answer

(A) Nicotine is a stimulant drug found in tobacco smoke. Its effects are as follows:$(i)$ It stimulates the adrenal gland to release adrenaline and nor-adrenaline,which increases blood pressure and heart rate. (Correct)(ii) It does not decrease the respiratory rate; rather,it often increases it or irritates the respiratory tract. (Incorrect)(iii) Tobacco smoke contains carcinogens that cause cancers of the lungs,throat,and bladder. (Correct)(iv) It is not primarily known for inducing allergies. (Incorrect)$(v)$ Smoking is a primary cause of emphysema,a chronic obstructive pulmonary disease. (Correct)(vi) Smoking increases carbon monoxide $(CO)$ levels in the blood,which binds to hemoglobin more strongly than $O_2$,thereby decreasing the oxygen-carrying capacity of the blood. (Correct)Therefore,statements $(i)$,(iii),$(v)$,and (vi) are correct. The total count is $4$.

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