Open soft-tissue facial trauma following a significant mechanism of injury:
A) often requires removal of foreign bodies that are impaled in the face.
B) is of most concern due to the possibility of permanent disfigurement.
C) suggests that the patient may have a closed head injury or spinal injury.
D) dictates the need for immediate intubation to protect the patient's airway.
Answer: C) suggests that the patient may have a closed head injury or spinal injury.
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The heart pumps approximately ________ liters of blood each day
A) 8,000 B) 15,000 C) 20,000 D) 50,000 E) 100,000
The juxtaglomerular cells release the enzyme ________ when the macula densa cells detect low blood volume or solute concentration.
Fill in the blank(s) with the appropriate word(s).
Where is the soma of an upper motor neuron that controls skeletal muscle found?
A. Anterior horn of the spinal cord B. Posterior horn of the spinal cord C. Postcentral gyrus of the cerebrum D. Motor association cortex of the cerebrum E. Precentral gyrus of the cerebrum
Which of the following statements about larger lymphatics is incorrect?
A. They have valves. B. They have thicker walls than veins. C. The tunica media has smooth muscle and elastic fibers. D. The endothelium of the tunica interna is similar to that of veins. E. The tunica externa is relatively thin.