BLOOD - (a) chemical signal from tissue - chemo taxis (4)...

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1 BLOOD (HEMA OR HEMO) 1. Functions a. Transport - nutrients, hormones, glucose, cholesterol, oxygen, ions, water, potassium b. Clotting c. Regulates pH d. Defense against pathogens (disease producing organisms) e. Stabilize body temperature 2. Characteristics a. Blood volume in avg. person - 5-6 quarts b. Six times thicker than water c. pH of blood is basic, 7.35-7.45 d. Temperature is 100.4 degrees 3. Components a. Plasma (liquid part) i. 90% water, 10% resp. gases, hormones, proteins (1) Albumin - large, regulates water movement between blood and tissues (2) Globulins - transport of vitamins, some are antibodies (3) Fibrinogens - clotting protein b. Formed elements i. Red blood cells/erythrocytes (RBC) - 99.9% - 120 day lifespan (1) Carry oxygen and carbon dioxide (2) flattened disks (3) Anucleate (4) Contain hemoglobin - protein contains iron (a) 4 protein chains - each can bind 1 oxygen molecule ii. WBC - leukocytes - many fewer (1) contain nuclei (2) major function - defense, clean up crew (3) WBCs can slip in and out of blood - diapedesis
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Unformatted text preview: (a) chemical signal from tissue - chemo taxis (4) leukocytosis - high WBC count (5) leukopenia - low WBC count (6) leukemia - very high WBC count, cancer (7) Wbc types (a) Granulocytes - live for 12 hours, also called PMNs (i) neutrophils - colorless - most abundant (ii) eusinophils - red (iii) basophils - blue/purple (b) Agranulocytes (i) lymphocytes - immune system (ii) monocytes - into tissues - macrophages - too big to eat (8) platelets - function in blood clotting (a) thrombocytes (b) megakaryocytes 4. Blood types a. Determined by antigenic components on surface of RBCs b. 4 main blood types - A, B, AB, O 5. WBC ABUNDANCE GREATEST TO LEAST a. Never let monkeys eat bananas 6. Hemostasis - blood clotting a. Vascular phase - blood vessel constricts b. Platelet phase - stick to damaged vessel wall c. Coagulation phase - clotting cascade, need calcium and vitamin K...
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This note was uploaded on 04/10/2008 for the course BIOL 109 taught by Professor Mister during the Spring '08 term at UMBC.

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BLOOD - (a) chemical signal from tissue - chemo taxis (4)...

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