According to the Frank-Starling mechanism:
A) systemic venous pooling of blood results in a decrease in preload.
B) an increase in systolic blood pressure causes a reflex bradycardia.
C) coronary artery perfusion is directly proportional to cardiac output.
D) the length of myocardial fibers determines force of cardiac contraction.
Ans: D) the length of myocardial fibers determines force of cardiac contraction.
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An unrestrained 32-year-old female motorist hit a utility pole head on at 45 mph. The car sustained extensive damage. She has an open airway, breathing poorly at 32 breaths per minute, and is responsive to painful stimuli. The radial pulse is rapid and weak, and her skin is cool and cyanotic. Breath sounds are decreased on the right side. Emergency Medical Responders are maintaining manual
in-line stabilization. Your next action would be to: A) start positive pressure ventilation. B) examine the patient for additional injuries. C) place a cervical collar and immobilize her. D) palpate the chest wall for instability.
Which of the following is an environmental risk factor for older adults?
A. Removal of area rugs B. Polishing of floors C. Use of several small area lights D. Installation of grab bars by toilets