The best anatomical parts to observe when critiquing a position on a radiograph should have a long axis that runs in which direction compared to the expected direction of shift?

The _________________ function of blood includes the delivery of substances such as hormones and electrolytes

a. Respiratory b. Excretory c. Regulatory d. Protective

Toward the end of a nitrogen washout test for functional residual capacity, the expired concen-tration of N2 begins rising. What does this probably indicate?

a. The patient is trying too hard. b. There is a leak in the system. c. The test is nearing completion. d. N2 is being trapped in the lungs.