Question 1
Infant respiratory distress syndrome is caused by
◦ surfactant-secreting cells that do not work yet.
◦ underdeveloped alveoli.
◦ clogged bronchioles.
◦ underdeveloped bronchi.
◦ small lungs.
Question 2
Life-long nonsmokers live an average of how much longer than those who in their mid-twenties smoked two packs of cigarettes a day?
◦ 6 months
◦ 1 to 2 years
◦ 3 to 5 years
◦ 7 to 9 years
◦ over 12 years