What is true regarding blood donation? The buffy coat contains platelets donated by one individual. Plasma donated by females is fractionated and processed for proteins (e.g., albumin, clotting factors). Infectious testing for blood donors includes HIV and Hepatitis only. Time periods between donation of whole blood or apheresis are both limited to the same frequency.
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When blood is centrifuged, a thin, gray-white layer called the buffy coat covers the layer of packed erythrocytes. What are the components of the buffy coat?
Adi S.
Once blood is given, it is centrifuged in a hematocrit tube to separate the components of the blood into the serum, buffy coat, and red blood cells to determine if there are antibodies present for Covid-19. What part of the hematocrit tube would contain the antigens for the ABO and Rh blood types - plasma, buffy coat, or red blood cells? Type the answer as one of the three choices exactly as given using lowercase letters. (1 point) What part of the hematocrit tube would contain the blood cells that function to produce antibodies to pathogens like Covid-19 - plasma, buffy coat, or red blood cells? Type the answer as one of the three choices exactly as given using lowercase letters. (1 point) What part of the hematocrit tube would contain the anti-Covid-19 antibodies if they were present in the blood - plasma, buffy coat, or red blood cells? Type the answer as one of the three choices exactly as given using lowercase letters. (1 point)
Kelan H.
Blood, the "life fluid" that courses through the body's blood vessels, provides the means by which the body's cells receive vital nutrients and oxygen and dispose of their metabolic wastes. As blood flows past the tissue cells, exchanges continually occur between the blood and the tissue cells so that vital activities can go on continuously. This chapter provides an opportunity to review the general characteristics of whole blood and plasma, to identify the various formed elements (blood cells) and to recall their functions. Blood groups, transfusion reactions, clotting, and various types of blood abnormalities are also considered. COMPOSITION AND FUNCTIONS OF BLOOD 1. Complete the following description of the components of blood by writing the missing words in the answer blanks: In terms of its tissue classification, blood is classified as a (1) because it has living blood cells, called (2), suspended in a nonliving fluid matrix called (3). The "fibers" of blood only become visible during (4). If a blood sample is centrifuged, the heavier blood cells become packed at the bottom of the tube. Most of this compacted cell mass is composed of (5), and the volume of blood accounted for by these cells is referred to as the (6). The less dense (7) rises to the top and constitutes about 45% of the blood volume. The so-called "buffy coat," composed of (8) and (9), is found at the junction between the other two blood elements. The buffy coat accounts for less than (10) % of blood volume. Blood is scarlet red in color when it is loaded with (11); otherwise, it tends to be dark red.
Supreeta N.
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