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Week 4 -- Discussion 4

Week 4 -- Discussion 4

Q Unit 4: Discussion Pick 2 of the bulleted prompts below to write about in this week’s discussion. Unit 4 – Blood Vessels & Circulation • Differentiate the types of blood vessels (arteries, veins, capillaries). Be sure to describe both the structure and function of each. How they are similar and how they differ. Discuss the 2 venous return mechanisms. • Identify the primary mechanisms of capillary exchange. Be sure to discuss capillary hydrostatic pressure and blood colloid osmotic pressure, explaining the contribution of each to net filtration pressure. • Explain the factors that affect blood flow and blood pressure. • Discuss the types of cardiovascular pressures and their related calculations. • Explain the neural, renal, and hormonal regulation of blood pressure. • Differentiate 4 homeostatic imbalances of the vasculature and what is occurring physiologically in a person with the condition. ________________________________________________________________________ General Discussion Requirements Your initial response to the Prompt below should be posted no later than midnight on Day 4 of the academic week. Your input should be in your own words, demonstrating your understanding and comprehension of the topic. Copying and Pasting from the internet will result in a zero. It is expected that you will include both in-text and final references properly formatted in APA on all initial discussion postings. For help with this refer to the Academic Writer tab to the left of your screen. Then, I want to see you respond to your classmates in the middle of the week (try for Day 4, 5, or 6). The purpose here is to generate discussion to further explore the topics...ask questions, add insight, agree or disagree, etc. Of course, all discussion should be positive and professional. Do not complete all discussions requirements in one sitting; you should post in the discussion 3-4 different days throughout the week. If you have questions about this participation requirement, post them to the Course Questions Forum. Refer to the rubric/syllabus for a complete breakdown of the expectations.

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Factors Affecting Blood Flow and Blood Pressure There are five variables/factors that influence blood flow and blood pressure i.e., Cardiac output, Compliance, Volume of the blood, Viscosity of the blood, Blood vessel length and diameter (J. Gordon Betts) 1. Cardiac Output Cardiac output is the measurement of blood flow from the heart through the ventricles, and is usually measured in liters per minute. Any factor that causes cardiac output to increase, by elevating heart rate or stroke volume or both, will elevate blood pressure and promote blood flow.