When auscultating the abdomen, how long should each quadrant be evaluated?

For an upright AP abdomen projection, the

1. ASISs are positioned at equal distances from the IR. 2. patient remains in an upright position at least 5 to 20 minutes before the image is obtained. 3. symphysis pubis should be included. 4. patient is instructed to take a deep inspiration before the image is obtained. a. 1 and 2 only b. 1, 2, and 3 only c. 2 and 3 only d. 3 and 4 only

The relationship between alveolar blood flow and alveolar airflow is called the:

A) ventilation-perfusion ratio. B) oxyhemoglobin ratio. C) Boyle/Warren ratio. D) gas/flow ratio