What percent of the total lung capacity (TLC) does the residual volume (RV) normally represent?

a. 10%
b. 20%
c. 30%
d. 40%

ANS: B
The typical normal TLC is 6.00 L. The normal RV is approximately 1.20 L and represents ap-proximately 20% of the TLC.

Health Professions

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What are "varicosities"?

a. Swollen tympanic membrane b. Swollen thyroid identified during physical examination c. Swollen or enlarged veins in the extremities d. A bruit identified during physical examination

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When transporting a patient to the hospital, you should:

A. generally exceed the posted speed limit by 10 to 20 mph. B. place the patient on a long backboard, even if no trauma is involved. C. secure the patient to the ambulance stretcher with at least two straps. D. be safe and get the patient to the hospital in the shortest practical time.

Health Professions