You are performing a microscopic examination of Mr. Henderson's urine sample. Under high-power magnification, you see the items shown in the picture. Which of the following is the most likely cause?





A.  Vigorous exercise

B.  Pyelonephritis

C.  Heavy-metal poisoning

D.  Renal ischemia

E.  Allergic reaction

B.  Pyelonephritis
The picture shows white blood cell casts, which may indicate pyelonephritis (inflammation of the kidney and renal pelvis).

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Which type of ventilation requires no additional personnel or equipment to set up and maintain?

A. Vertical B. Hydraulic C. Natural horizontal D. Mechanical horizontal

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