BGYC34_physioex_lab_5_assigment_2013, due Feb 8.doc

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Department
Biological Sciences
Course
BIOC34H3
Professor
Stephen Reid
Semester
Winter

Description
1 BIOC34; Second Assignment (2013) Farzook Fayyaz PhysioEx Lab 5 (Cardiovascular Dynamics) 998441397 Due Date: Friday, February 8, 2013 BIOB34 - LEC60 Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate Results: Provide the data illustrating the effects of blood vessel radius on blood flow rate. The data can be presented either in tabular form or as a graph. (1 mark) Activity 2: Studying the Effect of Blood Viscosity on Blood Flow Rate Results: Provide the data illustrating the effects of blood viscosity on blood flow rate. The data can be presented either in tabular form or as a graph. (1 mark) Activity 3: Studying the Effect of Blood Vessel Length on Blood Flow Rate Results: Provide the data illustrating the effects of blood vessel length on blood flow rate. The data can be presented either in tabular form or as a graph. (1 mark) 2 Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate Results: Provide the data illustrating the effects of blood pressure on blood flow rate. The data can be presented either in tabular form or as a graph. (1 mark) Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity Results: Provide the data illustrating the effects of altering blood vessel radius on blood flow rate (ml/min). (1 mark) Activity 6: Studying the Effect of Stroke Volume on Pump Activity Results: Provide the data illustrating the effects of altering stroke volume on blood flow rate (ml/min). (1 mark) 3 Activity 7: Compensation in Pathological Cardiovascular Conditions Results: Provide the data illustrating the effects of altering preload, contractility and afterload on blood flow and heart rate. (2 marks) Condition Flow Rad. L Rad. R Str. V Rate Press. L Press. Diff. R Normal 5086.8 3.0 3.0 70 72.7 40 40 Aortic stenosis 3310.0 3.0 2.5 70 47.3 40 40 Increased preload 3892.9 3.5 2.5 70 155. 40 40 6 4256.7 Increased preload 4.0 2.5 70 60.8 40 40 Increased contractility 4479.5 4.5 2.5 70 64.0 40 40 Increased contractility 3826.3 3.0 2.5 70 54.7 40 50 Increased contractility 4270.3 3.0 2.5 70 61.0 40 60 Decreased afterload 4656.3 3.0 2.5 70 66.5 40 70 3826.3 Decreased afterload 3.0 2.5 70 54.7 40 80 Decreased afterload 4270.3 3.0 2.5 70 61.0 40 60 Decreased afterload 4656.3 3.0 2.5 70 66.5 40 70 Questions 1) How might anaemia, polycythaemia, low erythropoietin levels, splenectomy and infection affect blood flow? Why? (5 marks) Anaemia is a condition where there is a reduced erythrocyte count (and a lack of iron). This leads to a reduction in blood viscosity and peripheral resistance (since these erythrocytes and plasma proteins slide past one another less frequently). Ultimately, this leads to a greater blood flow. Polycythaemia is a disorder characterized by an excess erythrocyte count, which leads to greater erythrocyte/plasma protein interactions and higher viscosity (also higher resistance). This results in a decreased blood flow. Erythropoietin is a hormone responsible for controlling the production of erythrocytes. A low erythropoietin level w
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