Answer :
The lethal dose of nicotine for an average adult is estimated to be about 50 mg, which is not listed among the provided options. Nicotine is absorbed into the bloodstream when inhaled, chewed, or smoked, and has significant stimulatory and toxic effects on the body.None of above options correct and correct answer is 50 mg.
The lethal dose of nicotine for the average adult is approximately 50 mg. Nicotine is a highly toxic substance, especially when it is not burned as in the case with cigarettes. The burning process of a cigarette significantly reduces the amount of nicotine that is actually inhaled. A typical smoker who smokes about 25 cigarettes in a day gets approximately 250 "hits" of nicotine due to the 10 puffs taken from each cigarette, which lasts for about 5 minutes when the cigarette is lit.
Upon absorption into the bloodstream, this drug immediately stimulates the adrenal glands, which in turn release the hormone epinephrine. This not only stimulates the central nervous system but also results in increased blood pressure, respiration, and heart rate. Despite its stimulatory effects, nicotine can lead to depression thereafter and is highly toxic, particularly when injected. Its use has been extended to agricultural practices as a contact insecticide due to its high toxicity levels to animals.None of above options correct and correct answer is 50 mg.
