Bio Week 5 notes
Bio Week 5 notes BIO 151-001
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This 4 page Class Notes was uploaded by Regan McGillick on Saturday February 27, 2016. The Class Notes belongs to BIO 151-001 at University of Wisconsin - Eau Claire taught by Kelly L. Murray/ Kelly Jo Wright in Spring 2016. Since its upload, it has received 15 views. For similar materials see Biology of Humans in Biology at University of Wisconsin - Eau Claire.
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Date Created: 02/27/16
Week 5 Bio: Components and the Functions of Circulatory System: Chapter 7 and 8 --Bloods Functions: a. transportation: O2 through lungs, nutrients in digestive system, hormones, and movement of waste b. regulation: body temp., body water, pH of body fluids c. defense: white blood cells for dense against diseases and prevent excessive blood loss (all of these functions contribute to the act of HOMEOSTASIS) 1. Components: a. Plasma (liquid portion) b. Cellular components: red and white cells and platelets >>when separated, the blood components divide: bulk of what is at bottom is made up of red blood cells, platelets and white cell go to the top A. Plasma: 1. 90% water 2. Rest: a. Proteins-largest i. Albumins= maintains proper water balance, from the liver ii. Globulins= transport things in blood- bind to lipid molecules 1. Lipoprotein (low or high density) b. Nutrients c. Endocrine hormones d. Ions and minerals e. Some o2 and CO2 3. FUNCTION: clotting to minimize blood loss. Know difference between blood and cells B. Red Blood Cells: (erythrocytes) 1. COMPONENETS: a. No nucleus (varies from organism) b. No organelles c. Hemoglobin=fluid bags d. Iron at the center 2. TRAITS: no mitosis, live 4 months 3. FUNCTIONS: a. Transport oxygen b. Transport CO2 << O2 diffuses with blood plasma and into cell, there it attaches to the iron in the hemoglobin (when O2 + iron = blue -> red color) C. Platelets: small cytoplasm fragments 1. Originate from the cells in red marrow of certain bones= STEM CELLS a. Immature cells that are produced by division of stem cells= lack nucleus b. Immature cells develop into erythroblasts, fill with hemoglobin= erythroblasts or Red Blood Cell 2. Old/damaged RedBloodCells = macrophages -> from monocytes largest white blood cell) -> eat RBCs -> Phagocytosis D. White Blood Cells: (leukocytes) 1. COMPONENTS: a. Nucleus b. No hemoglobin c. Larger cells 2. TRAITS: a. Life 3-5 days b. 1 WBC to 700 RBC (except when an injury or illness is detected) 3. FUNCTIONS: a. Fight infection by: i. Phagocytosis: engulfing and digesting the foreign bacteria ii. Immune response: overall prevent infections b. Activated by a tissue injury –leave vascular system and circulate in tissue 2. Cardiovascular System: a. Blood= maintaining a constant forward structure of flow- b. Heart= muscle-enclosed in Pericardium (a loose membrane covering and prevents friction as heart contracts) c. Formulation: A. Chambers: Right Atrium and Left Atrium 1. Atrium=receive blood B. Ventricles: Right Ventricle and Left Ventricle 1. Ventricles=pump blood Divided by a Septum wall d. Valves: prevent back flow-moving and processing A. Tricuspid (right side)//Bicuspid (left side) 1. Between the Atrium and Vessels a. Cusspids: open/close that allows blood in/out e. Pulmonary Circuit: Hear lungs heart (exchanging CO2 for O2) f. Systemic Circuit: heart all cells heart (blood going throughout body) A. Right Left -Enters from vessels: prevaca, postcava, and hermizygous -right atrium-> tricuspid -> right ventricle ->pumps blood out -> pulmary semilunar 3. Cardiac Cycle: a. Diastole = atria and ventricles at rest A. tricuspid and bicuspid valves open = filling up with blood b. Atrial systole = atria contract = blood into ventricles A. Tricuspid and bicuspid valves open; semilunar valves open B. Filling up with ventricles – “greatest force” c. Ventricular systole - ventricles contract -> blood into pulmonary & aorta Coronary Circulation AORTA RIGHT CORANRY ARTERY LEFT CONARY ARTIERY 4. Blood Vessels: -one of most extensive systems/tissues in body a. arteries – away from heart -oxygenated blood -smooth bloods out b. arterioles – From arteries -smaller -further reduce blood pressure -. Capillary sphincters – end of arterioles – open and close to divert blood c. Capillaries – extensive, small, thin-pass single row of RBCs -form extensive beds to every cells d. Venules – from the capillary beds e. Veins – large, thing walls (tend to collapse) I. Vessels Functions: exchange between capillary and each cell a. Cells are close in order to use diffusion b. Need to maintain forward flow (capillary exchange=balance) c. Need a balance i. All forward pumping -> blood may leak =need a return process d. Albumin in Vessels = in plasma – draw H2O in and act as a solute 5. Cardiovascular Diseases: a. Cholesterol b. Heart Attack c. Stroke Fibrillation: symptoms of a heart attack o Excessive/ rapid contractions o 1. Electrocution o 2. Death of tissue (The order and information was given and is of the credit of Professor Kelly Murray, of Biology 151)
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