Which of the following statements about secondhand smoke is not true? a. the particles found in secondhand smoke are smaller than the particles found in firsthand smoke. b. secondhand smoke can have higher concentration of dangerous chemicals than firsthand smoke. c. secondhand smoke is inhaled less deeply than firsthand smoke. d. breathing secondhand smoke is at least as dangerous as breathing firsthand smoke. select the best answer from the choices provided. a b c d

Your Answer would be C. Secondhand smoke is inhaled less deeply than firsthand smoke.

The answer is C. Secondhand smoke is inhaled less deeply than firsthand smoke (they are inhaled in the same way).

Passive smoking (or secondhand smoking) is the involuntary inhalation of smoke from the burning of cigarettes or cigars (for example, in the ashtray), or by one or more smokers (tertiary current). Environmental tobacco smoke (ETS) breathed by a person exposed to second-hand smoke is a mixture of second-hand smoke (about 80%) and tertiary-phase smoke.

Cigarette smoke contains about 4,000 different chemicals, including 60 carcinogens. It is dangerous for the smoker and also for people nearby. The cigarette smoke inhaled directly by the smoker (primary stream), if it contains approximately the same concentration of nicotine, has a composition very different from that which escapes laterally from the cigarette (secondary stream) because the combustion very incomplete, to lower temperature, contains 3 times more CO (toxic), 7 times more benzene, 70 times more nitrosamines and 100 times more ammonia (irritants) than primary smoke or that released by smoker (tertiary current).

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