Babies born to mothers who smoke during pregnancy often have
Correct answer: B. a low birth weight
- A. a higher than average birth weight
- B. a low birth weight
- C. extra ribs
- D. immunity against respiratory infection
Explanation
Carbon monoxide and nicotine reduce the oxygen and blood supply to the fetus, restricting growth and raising the risk of premature birth. This is one of the strongest arguments against smoking in pregnancy.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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