What is the hematocrit?

A) The concentration of platelets found in a blood sample
B) The mass percentage of blood made up of red and white blood cells
C) The ratio of the number of white blood cells to the number of platelets
D) The volume of whole blood occupied by packed red blood cells

D

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A tuning fork is an instrument used to check tendon reflexes

Indicate whether the statement is true or false

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Vacuum blood tubes come in all of the following sizes, EXCEPT ________.

A. 7 mL B. 10 mL C. 15 mL D. 20 mL

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