Approximately what percent of the normal changes in thoracic volume during quiet inspiration is due to the action of the diaphragm?

a. 15
b. 25
c. 50
d. 75

ANS: D
During quiet breathing, the diaphragm is responsible for approximately 75% of the change in thoracic volume.

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The PSA nerve branches from the maxillary nerve in the ________ fossa prior to entering the infraorbital canal

Fill in the blank(s) with correct word

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