Which of the Following Is an Age-Related Change in the Chest

Multiple Choice

Which of the following is an age-related change in the chest wall?

A) The joints of the thorax become more rigid,and cartilage becomes calcified.
B) The diaphragm becomes more flexible,resulting in less force during inhalation.
C) Arterial oxygen tension and saturation decrease.
D) Recumbent position increasingly improves pulmonary capacity by expanding chest wall.