CH19 BLOOD

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basophils

Histamine is a chemical that causes blood vessels to dilate in an effort to increase the flow of blood and subsequently leukocytes to the infected site. Which of the following leukocytes release the most histamine?

lymphocytes

Leukocytes can be partially identified by looking at their nucleus. All leukocytes have just one nucleus, but some have several lobes to their nucleus. Which of the following does NOT have a multi‐lobed nucleus?

20-25%

Leukocytes make up less than 0.5% of whole blood; however, of that small value approximately __________ are lymphocytes.

lymphocytes

Some of the leukocytes have granules in their cytosol that consist of a variety of chemicals involved in defending the body. Which of the following cells typically do NOT contain granules?

basophils

There are five major leukocytes. Which of the following is the rarest of the five when a person is not sick?


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