Human Anatomy- Chapter 21 Quiz

The life span of an erythrocyte is about _________ days.

120

Plasma makes up about ______ percent of a centrifuged sample of whole blood.

55%

One of the functions of blood is to regulate fluid levels in the body. If too much fluid escapes from the bloodstream and enters the tissues, blood pressure will

Decrease

Old erythrocytes are phagocytized in the

Liver & spleen

The leukocyte that will migrate in the blood and take up residence in the tissues as macrophages are the

Monocyte

Blood is correctly classified as a(n)

Tissue

Which term best describes the function of blood when considering the presence of leukocytes and antibodies?

protection

The smallest and most abundant plasma proteins are the

Albumins

The leukocyte that releases histamine is the

Basophil

The reason it is more appropriate to call an erythrocyte a "formed element" rather than a "cell" is that erythrocytes

Lack a nucleus & organelles

The leukocyte that is very active during a bacterial infection is the

Neutrophil

Why is the name "thrombocyte" inappropriate for platelets?

They have no nucleus

Which term best describes the function of blood when considering the presence of carbon dioxide and endocrine hormones?

Transportation

Which are characteristic of leukocytes?

have a nucleus, have no hemoglobin, and depending on type, may or may not contain granules

The process of producing the formed elements of blood is called

hemopoiesis

T-cells are a category of

lymphocytes

Which leukocytes are granulocytes?

neutrophils, eosinophils, and basophils

The difference in the concentration of various constituents in the plasma and interstitial fluid ensures that the constituents will

that the constituents will be able to diffuse through the capillary wall

Usually the most numerous of the leukocytes are the

the neutrophils

Usually the least numerous of the leukocytes are the

basophils