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22 Cards in this Set
- Front
- Back
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Erythrocytes constitute less percentage of whole blood volume than plasma. However, they settle at the bottom because _______.
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-numerous red blood cells give this fraction a very high density
-white blood cells and platelets are less dense -the plasma is 98% water |
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Another name for the erythrocyte fraction is the ____.
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hematocrit
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The term "formed elements" refers to _____.
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the cellular components of blood
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Which of the following organs serves as a major storehouse for iron?
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liver
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True/False
Men do not need as much iron in their diet as women. |
True
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True/False
An excess of plasma protein causes the blood to flow too swiftly through the veins, but it's fine in the arteries. |
False
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True/False
Monocytes leave the bone marrow to live for years as macrophages |
True
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True/False
Aspirin suppresses the formation of thrombosis and helps prevent heart attacks |
True
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The most abundant plasma protein is ____.
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albumin
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In the adult, blood formation occurs in the ____.
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red bone marrow and lymphoid tissues
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What are the functions of blood?
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-nutrient transport
-heat transfer -clotting -pH buffering |
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The most common nutrient in the blood is ____; the most common electrolyte is ____; and the most common nitrogenous waste is _____.
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protein; Na+; urea
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Hematocrit is the percent volume of ____ and averages about ____ percent.
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erythrocytes; 45
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Blood serum is essentially the same as blood plasma, except that plasma contains ____ and serum does not.
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fibrinogen
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The viscosity of blood is due more to ____ than to any other factor.
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erythrocytes
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Drinking seawater would ____ blood osmolarity, and the tissues would become ____ dehydrated.
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increase; more
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Normal saline has a salinity of about ____.
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0.9%
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The formed elements in the blood that have one nucleus are the ____, while the formed elements that have no nucleus are the _____.
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leukocytes; erythrocytes and platelets
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What is the largest cell?
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megakaryocyte
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____ are formed elements of the blood that are not and never were true cells.
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platelets
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Erythrocytes transport oxygen and serve to _____.
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transport carbon dioxide
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The _____ is especially involved in breaking up old erythrocytes and disposing of the cellular remains.
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spleen
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