Which of the following is an accurate description of breathing mechanics?
A. The relaxation of the diaphragm expands the thoracic cavity, creating a vacuum that draws in air.
B. The contraction of the diaphragm expands the thoracic cavity, creating a vacuum that draws in air.
C. The contraction of the diaphragm reduces the thoracic volume, creating a positive pressure that forces air out.
D. The contraction of the diaphragm expands the thoracic cavity, creating positive pressure that draws in air.
Answer: B. The contraction of the diaphragm expands the thoracic cavity, creating a vacuum that draws in air.
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Answer the following statement true (T) or false (F)
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Indicate whether this statement is true or false.
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