A 45-year-old woman with systemic sclerosis (scleroderma) comes to the physician because of a 3-week history of progressive shortness of breath and nonproductive cough. Her temperature is 36.9°C (98.4°F), pulse is 82/min, respirations are 20/min, and blood pressure is 136/85 mmHg. Crackles are heard in both lower lung fields. Pulmonary function tests show total lung capacity is 80% of predicted, and diffusing capacity for carbon monoxide, corrected for alveolar volume, is 65% of predicted. Histologic examination of a lung biopsy specimen is most likely to show which of the following findings?

A. Diffuse interstitial fibrosis

B. Intra-alveolar exudates

C. Multiple thromboemboli

D. Necrotizing vasculitis

E. Non-necrotizing interstitial granulomas

Which of the following conditions correlate with the following information:

Low pH Low HCO3 Low BE Neutral pCO2

A. Respiratory alkalosis

B. Respiratory acidosis

C. Metabolic acidosis

D. Metabolic alkalosis

If you are using a stethoscope and trying to detect the tricuspid valve which of the following would be the best location?

A. Within 2 inches of the xiphoid process

B. On the right side of the sternum

C. On the left side of the sternum near the midpoint

D. On the left side of the sternum near the midpoint of the sixth rib

Which of the following microorganisms stain well?

A. Escherichia coli

B. Legionella pneumophila

C. Treponema

D. Chlamydia

Chagas' disease is commonly treated with Nifurtimox and is linked to the ____microorganism.

A. Naegleria

B. Schistosoma

C. Wuchereria bancrofti

D. Trypanosoma cruzi