Psio 202, lecture 1

Psio 202, lecture 1 - PSIO 202 Human Anatomy and Physiology...

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Unformatted text preview: PSIO 202 Human Anatomy and Physiology Lecture 1 Cardiovascular System:the Blood; Physical Properties Objectives and Reading Assignment Reading: Tortora, pages 689-695 Lecture Objectives Describe the important components of blood Know the general composition of plasma and formed elements Understand the major functions of blood Compare and contrast plasma and serum Preliminary Information What I am now How I got here What I expect of students Preliminary Information, 2 I will come to every class prepared to teach, and will treat students with respect My recommendations for study: Read the book Read the class notes Come to class, stay awake and TAKE NOTES Preliminary Information, 3 You are responsible for any information covered during my lectures Conflicts between the text and my own class notes or lecture material should be brought to my attention for clarification I like students that ask questions Office hours and how to reach me Office hours Monday & Tuesday, 12:001:00 PM, Gittings 119, and by appointment. My phone number is 621-2203 My e-mail address is: fregosi@u.arizona.edu Body fluids Cells of the body are serviced by 2 fluids blood interstitial fluid Nutrients and oxygen diffuse from the blood into the interstitial fluid & then into the cells Wastes move in the reverse direction Hematology is study of blood and blood disorders Composition of blood 1. 2. Plasma, a clear, straw colored watery liquid that consists of 91.5 % water, and 8.5 % solutes. Formed elements, which are cells and cell fragments. Blood Plasma 0ver 90% water 7% plasma proteins created in liver confined to bloodstream albumin maintain blood osmotic pressure globulins (immunoglobulins) antibodies bind to foreign substances called antigens form antigen-antibody complexes fibrinogen for clotting 2% other substances electrolytes, nutrients, hormones, gases, waste products Tortora & Grabowski 9/e 2000 JWS 19-7 Formed Elements of Blood Red blood cells ( erythrocytes ) White blood cells ( leukocytes ) granular leukocytes neutrophils eosinophils basophils agranular leukocytes lymphocytes = T cells, B cells, and natural killer cells monocytes Platelets (special cell fragments) Tortora & Grabowski 9/e 2000 JWS 19-8 Platelets Platelets, or thrombocytes The major function of platelets is blood clotting Platelets are irregular shaped cell fragments, with a diameter of about 2-4 micrometers There are about 150,000-400,000 platelets per microliter of blood. Hematocrit Percentage of blood occupied by cells female normal range 38 - 46% (average of 42%) male normal range 40 - 54% (average of 46%) testosterone Anemia not enough RBCs or not enough hemoglobin Polycythemia too many RBCs (over 65%) dehydration, tissue hypoxia, blood doping in athletes Tortora & Grabowski 9/e 2000 JWS 19-9 Blood Doping Injecting previously stored RBC's before an athletic event more cells available to deliver oxygen to tissues Dangerous increases blood viscosity forces heart to work harder Banned by Olympic committee Tortora & Grabowski 9/e 2000 JWS 19-10 ...
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