Which of the following is the measure of the percentage of formed elements in the blood?
A) platelets
B) hemoglobin concentration
C) hematocrit
D) anemia
C
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The first respiratory structures without cartilage as a supporting tissue are the ________.
A. primary bronchi B. secondary bronchi C. bronchioles D. alveolar ducts
Which of the following organs help maintain the proper pH of body fluids?
a. kidneys by forming urine b. lungs by exhaling carbon dioxide c. spleen by filtering the blood d. both A and B above
In the inflammatory response, clotting proteins form a clot. This action
A. produces edema. B. walls off foreign particles and microbes. C. increases the permeability of blood vessels. D. phagocytizes microbes. E. stimulates pain receptors.
Which of the following is not a branch off the arch of the aorta?
A. Left common carotid artery B. Right common carotid artery C. Brachiocephalic artery D. Left subclavian artery