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SCN1111 Haematological Exam Latest Update
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SCN1111 Haematological Exam LatestUpdate
Describe the composition of blood - Answer Blood has 4 main components
Plasma which is 55% mostly water, the rest of plasma proteins (and some other
elements)
Formed elements which is 45% this includes RBC, WBC and platelets
Discuss the function of plasma - Answer Plasma contains proteins that help blood clot
Transports dissolved substances around the body as needed (nutrients, hormones and
proteins)
eg. it transports glucose around body for use by cells
What are the plasma proteins - Answer albumin, fibrinogen, globulins
What does albumin do - Answer Carrier molecule for substances and drugs. Increases
size of molecule so they cannot diffuse across until they get to where they are needed.
Controls passage of water and solute through capillaries therefore maintaining the
critical colloidal osmotic pressure
What does fibrinogen do - Answer Glycoprotein involved in blood clotting. Circulated in
the blood when injury occurs, converted to fibrin to assist in clotting cascade.
What does globulin do - Answer Protein that protects body from foreign invaders.
What are the cellular components of blood - Answer Erythrocytes (RBC), Leukocytes
(WBC), Thromocytes (platelets)
What is the function of erythrocytes - Answer Red blood cells carry oxygen from the
lungs to the tissues and take carbon dioxide back to lungs to be expelled. Contain
haemaglobin which is the element on RBC that binds oxygen
What is the function of a leukocyte - Answer Whites blood cells are the cells of the
immune system. Involved in protecting the body from infectious disease and foreign
invaders.
What is the function of a thrombocyte - Answer Also called platelets. Function is to react
to a bleeding blood vessel injury by clumping and starting a blood clot.
What is the mononuclear phagocyte system - Answer The mononuclear phagocyte
system consists of cells that originate in the bone marrow, differentiate into monocytes
that are transported into the blood stream and settle in the tissues as mature
macrophages.
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