which of the following
are correct
A. the diaphragm contracts-volume of chest cavity increases
B. The diaphragm contracts-volume of chest cavity decrease
C. The diaphragm expands-volume of chest cavity increases
D. The diaphragm expands-volume of chest cavity decrease
A. (I) only
B. I and ii only
C. ii and iii only
D. iv only
Answers
Answered by
3
Answer:
A ) (I) only
Explanation:
The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.
Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.
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