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blood
Chapter 17
22
Biology
Undergraduate 1
02/25/2012

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Term
composition of blood
Definition
Plasma 55% of whole bloood
buffy coat
formed elements 45% of whole blood
Term
function of blood
Definition
delivery (4)O2 from lungs to tissues CO2 from tissues to lungs, transports heat, transports metabolic waste products, transports hormones from endocrine organs to target organs
protection (2)protein & platelets clotting to prevent blood loss, wbc to prevent infection
regulatory (2)maintains pH, maintains blood volume
Term
what is an erythrocytes
Definition
red blood cell
Term
structure of erythrocyte
Definition
small cell, biconcave shape,no nucleus, very few organelles.4-6 million.
Term
function of erythrocyte
Definition
transports O2 and CO2. sacks of hemoglobin
Term
hematopoiesis
Definition
blood cell formation occures in the red bone marrow.
Term
Stages of erythropoiesis
Definition
Hemocytoblast(myeloid stem cell) - erythroblast stage - reticulocyte - erythrocyte
Term
how are old or damaged erythrocytes removed
Definition
by macrophages of the liver and spleen.
Term
5 types of leukocytes
Definition
basophil, eosinophil, neutrophil, lymphocyte, monocyte
Term
what are leulocytes?
Definition
white blood cells, 5 types, 4-11,000 in body, for defense and immunity.
Term
Neutrophil
Definition
Multilobed nucleus, inconspicuous cytoplasmic granules, phagocytize bacteria
Term
Eosnophil
Definition
bilobed nucleus, red cytoplasmic granules. Kills parasitic worms. Complex role in allergy and asthma
Term
Basophil
Definition
Bilobed nucleus, large purplish-black cytoplasmic granules. Release histamine and other mediators of inflamation.
Term
Lymphocyte
Definition
Spherical or indented nucleuas, pale blue cytoplasm. Mount immune response by direct cell attack or via antibodies.
Term
Monocyte
Definition
U or kidney shaped nucleus, gray-blue cytoplasm. Phagocytosis; develop into macrophages in the tissues
Term
Platelets
Definition
Cytoplasmic fragments containing granules, stain deep purple. Seal small tears in blood vessels. instrumental in blood clotting.
Term
Fibrinolysis
Definition
removes unneeded blood clots when healing has occurred.
Term
Process of hemostasis
Definition
1 injury- platlets adhere
2 platelets release seratonin (causing vascular spasms)
3 thromboplastin is released by damaged cells
4 PF3 + thromboplastin =clotting cascade
5 prothrombin activator converts prothrombin to thrombin (enzyme)
6 thrombin + fibrinogen = fibrin
Term
fibrin
Definition
insoluble long hairlike molecules that trap RBC to form scabs
Term
osmotic pressure
Definition
the way the body regulates the blood volume. The pressure that keeps water in the blood stream.
Term
albumin
Definition
protein that regulates osmotic pressure, produced by the liver.
Term
4 blood groups
Definition
A, B AB, O
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