Urine-specific gravity is an index of the ability of the kidney to:
A) concentrate the urine. B) filter the plasma.
C) reabsorb sodium ions. D) adjust the hydrogen ion concentration.
A
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Which of the following uses magnetism versus gas pressure as its basic principle of operation?
a. Bird Mark 14 ventilator b. Puritan Bennett PR-2 ventilator c. The Vest Airway Clearance System (also known as the ThAIRapy Vest) d. Percussionaire Intrapulmonary Percussive Ventilator (IPV-1)
A male patient (76-kg IBW) with no history of pulmonary disease is brought to the emergency department for treatment of a drug overdose. He is intubated and placed on mechanical ventila-tion with VC-CMV, f = 12/min, VT = 450 mL
The resulting arterial blood gas values are: pH 7.32, PaCO2 53 mm Hg, and HCO3? 25 mEq/L. The most appropriate action to correct the acid-base disturbance is which of the following? a. Increase VT to 595 mL. b. Increase VT to 760 mL. c. Increase frequency to 16/min. d. Decrease frequency to 10/min.
Pseudoepitheliomatous hyperplasia is a frequent microscopic finding of a neural-derived benign tumor in which granular cells expand submucosa. This lesion is known as:
a. Traumatic neuroma b. Neurofibroma c. Neurilemmoma d. Leiomyoma e. None of the above
A periodontal abscess is primarily composed of
A) bacteria, dental calculus. B) bacteria, plasma cells, neutrophils. C) bacteria, dead tissue, neutrophils. D) dental calculus only.