How many blood cells are made each day in the bone marrow of a normal adult?
a. Thousands
b. Millions
c. About 1 billion
d. Hundreds of billions
ANS: D
Hundreds of billions of blood cells of all types must be made on a daily basis to maintain normal blood levels of the various cells types. White cells use the bloodstream as a "street" to get from their site of production to tissue, which is their primary site of function.
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The normal fetal heart tone (FHT) is ________ beats per minute and can be detected at 10 to 12 weeks using a Doppler fetal pulse detector
a. 10 to 40 b. 40 to 80 c. 80 to 120 d. 120 to 160
Only about 1.5 percent of the oxygen content of arterial blood consists of oxygen molecules in solution. The rest of the oxygen molecules are bound to ________ molecules
A) leukocyte B) hemoglobin C) macrophage D) hematocrit