Paranasal sinuses are located within which of the following bones? 1. frontal bone 2. sphenoid 3. ethmoid 4. maxilla 5. nasal bone
A) 1, 2, 3, 4, 5
B) 1, 2, 3, 4
C) 1, 3, 5
D) 1, 2, 3
E) 3, 4, 5
B) 1, 2, 3, 4
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Hypoventilation causes __________.
a) an increase in blood pH b) a decrease in respiratory rate c) an increase in blood PO2 d) an increase in blood PCO2
Motor commands are carried by ________ from the brain along the spinal cord.
A. descending tracts B. both anterior and posterior roots C. spinal nerves D. cranial nerves E. ascending tracts
Which of the following group of three structures may cause apparent "constrictions" of the esophagus on an oblique chest radiograph after the patient has swallowed barium?
A) arch of the aorta, left main bronchus, diaphragm B) arch of the azygos vein, left main bronchus, diaphragm C) left brachiocephalic vein, arch of the azygos vein, diaphragm D) arch of the aorta, left main bronchus, left main pulmonary vein E) left brachiocephalic vein, arch of the aorta, left main pulmonary vein
Functionally, carbohydrates are most important as
A) storage of glucose molecules. B) a part of nucleic acid structure. C) sources of energy. D) receptors of the cell surface. E) insulation under the skin.