Air-fluid levels on an AP chest projection
1. demonstrate an increase in density where the fluid is present.
2. are formed when air and fluid separate.
3. are precisely demonstrated when the patient is in a partially upright position.
4. are precisely demonstrated when the central ray is horizontal.
a. 1 and 3 only
b. 1, 2, and 4 only
c. 2 and 4 only
d. 2, 3, and 4 only
C
Health Professions
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Some changes that take place as a person ages include all of the following EXCEPT _______
a. faster processing of new material b. decreased short-term memory c. decreased dexterity d. increased anxiety over new situations
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Low-level laser dosage is measured in
A) J/cm2 B) wt/cm2 C) milliamps D) milliwatts
Health Professions