tion Completion Status: accumulation of "waste products" in cells can damage important substances (like collagen) and disrupt normal physiological processes. QUESTION 17 Lungs: With age, lung function becomes "less efficient." Which one does not explain why? Lung tissue becomes more "elastic" resulting in less expansion. O There is a decrease in "reserve capacity" that affects stamina. There is a decrease in the number of airs sacs for oxygen transport. O Muscles in the rib cage become weaker and reduce contraction. QUESTION 18 Which one below does not describe normal age-related changes in the skeletal syste O Loss of bone-density

tion Completion Status: accumulation of "waste products" in cells can damage important substances (like collagen) and disrupt normal physiological processes. QUESTION 17 Lungs: With age, lung function becomes "less efficient." Which one does not explain why? Lung tissue becomes more "elastic" resulting in less expansion. O There is a decrease in "reserve capacity" that affects stamina. There is a decrease in the number of airs sacs for oxygen transport. O Muscles in the rib cage become weaker and reduce contraction. QUESTION 18 Which one below does not describe normal age-related changes in the skeletal syste O Loss of bone-density