24 Questions
What is the main function of platelet factors in the blood?
To initiate blood clotting and minimize blood loss
What is the primary role of leukocytes or WBCs in the blood?
To destroy invading microorganisms and cancer cells
What is the name of the liquid part of the blood that contains various substances?
Plasma
What is the function of blood in regulating body temperature?
Transfer of heat to the skin
What is the name of the system of blood vessels that blood circulates through?
Closed system of blood vessels
What is the total volume of blood in an average adult?
5 liters
What is the main function of red blood cells?
To carry oxygen from the lungs to the tissues
What is the average number of red blood cells per cubic millimeter in normal men?
5.2 million
What is the primary function of albumin in blood plasma?
To maintain osmotic balance
What is the function of gamma globulins in blood plasma?
To produce antibodies
What is the role of fibrinogen in blood plasma?
To clot blood
What percentage of plasma proteins is comprised of albumin?
60-80%
What is the average lifespan of RBCs in the circulatory system?
120 days
What is the primary function of cytoplasmic enzymes in RBCs?
Metabolizing glucose and forming ATP
What is the result of a deficiency of polypeptide chain in Thalasemia?
Decrease in concentration of Hb
What is the effect of the progressive decrease in metabolic activity of RBCs with time?
RBCs become more fragile
What is the role of ATP in RBCs?
Maintaining the structure of the cell membrane
What is the cause of Erythroblastosis fetalis?
Antibodies from the mother
What is the name of the ratio between plasma and cellular elements in the blood?
Hematocrit
What is the main organ responsible for producing red blood cells during the middle trimester of gestation?
Liver
What is the term for a deficiency of red blood cells?
Anemia
What is the name of the process by which all types of blood cells are produced?
Hemopoiesis
What is the term for the loss of function of bone marrow?
Aplastic anemia
What is the name of the sac where primitive, nucleated red blood cells are produced in early embryonic life?
Yolk sac
This quiz covers the basics of blood, its functions, and circulation through the cardiovascular system. It also explores the three main roles of blood: transportation, protection, and regulation.
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