Along with nicotine, cigarette smokers receive tars, phenols, hydrocarbons, arsenic, and many other chemicals. Which of the following is not an effect of smoking tobacco?

Options

A. Narrowing or hardening of blood vessels in the heart and brain.
B. A higher frequency of respiratory infections (e.g., colds, pneumonia).
C. A higher risk of cancer, including cancer of the lungs, mouth, larynx, bladder and kidneys.
D. None of these

Answer

D

Explanation

Cigarette smoking has a lot of ill effects on body. Benzprene present in tobacco smoke causes lung and throat cancel. Cigratte smoking is a major CHD (coronayr heart disease) risk factor for cardiovascular diseases. Tobacco smoke also irritates the mucous membrane of the throat and bronchi causing cough and bronchitis. It may breakdown the lung alveoli which reduces the surface for gas exchange.