Which of the following describes the thymus?
A. It decreases in size as a person ages.
B. It removes aged RBCs from circulation.
C. It is the largest lymphatic organ.
D. It is filled with blood and macrophages.
E. If it is removed, the liver takes over its functions.
A. It decreases in size as a person ages.
The thymus is large in infants because it assists with the production of lymphocytes for the child's immature immune system. As a person ages, the thymus shrinks.
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Atrial flutter is characterized by
A) a run of six or more PACs in a row. B) P waves of varying shapes and regularly spaced QRS complexes. C) irregularly irregular pattern of QRS complexes. D) regularly spaced V-shaped waves.
?-aminohippurate is used to measure:
A) tubular secretory capacity. B) glomerular filtration. C) tubular reabsorptive capacity. D) tubular concentration.