Which of the following is the appropriate temperature for hospital freezers?

Which of the following is true of the left ventricle?

A) During contraction, the diameter of the ventricular chamber decreases. B) It is thicker than the right ventricle. C) During contraction, the distance between the heart's apex and base decreases. D) All of the above

A 65-year-old male is intubated and placed on a mechanical ventilator after a motor vehicle ac-cident

Thirty-six hours later he develops infiltrates on the chest radiograph. Which of the following ac-tions may have been able to prevent this from occurring? 1. Elevation of the head of the bed 20 to 30 degrees 2. Aspiration of subglottic secretions 3. Changing ventilator circuit every 24 hours 4. Stress ulcer prophylaxis 5. Avoid the use of sedatives a. 1 only c. 1, 2, 4, and 5 b. 1, 3, and 5 d. 1, 2, 3, 4, and 5