Match each of the following elements with their symbol.
A. S
B. Li
C. Ca
D. Na
A. sulfur
B. lithium
C. calcium
D. sodium
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What is the purpose of the red blood cells?
A) They are crucial in the formation of clots. B) They are critical in response to infection and are mediators of the body's immune response. C) They are responsible for the delivery of oxygen to the cells. D) They are responsible for the removal of oxygen from the cells.
The chromosome abnormality type that results in a daughter cell with an extra chromosome—or trisomy—or a daughter cell with a loss of chromosome is characterized as which of the following?
a. Constitutional aberration or mosaic b. Numerical aberration c. Structural aberration d. Acquired aberration
Into what structures does the pulmonary trunk divide?
a. superior and inferior vena cava b. right and left pulmonary veins c. right and left pulmonary arteries d. right and left coronary arteries
Unstable angina pectoris is characterized by:
A. a fixed frequency of chest pain or pressure that is often relieved by rest and several doses of nitroglycerin. B. chest pain or discomfort that may not be relieved by rest or nitroglycerin, and that occurs without a fixed frequency. C. chest pain or pressure that lasts longer than 15 minutes and is associated with myocardial necrosis. D. chest pain or pressure that occurs during periods of strenuous activity and promptly subsides with rest.