Physio 9.0 Cardio Lab Report Essay

2283 WordsJan 20, 201310 Pages
Physio Cardio Lab Report Answers Activity 1 Questions: 1. Explain how the body establishes a pressure gradient for fluid flow. Pressure gradient is the flow rate of a liquid through a pipe. This is directly proportional to the difference between the pressures at the two ends of the pipe and inversely proportional to the pip's resistance. The pressure gradient is directly dependent upon blood vessel radius which essentially controls blood flow. The bigger the blood vessel radius, the more blood flow or fluid flow. The smaller blood vessel radius, the lesson blood or fluid flow. 2. Explain the effect that the flow tube radius change had on flow rate. How well did the results compare with your prediction? Flow tube radius…show more content…
Activity 3 Questions: 1. Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? A change in blood vessel radius is more like to occur because blood vessel length only increases as we grow into maturity and in adulthood blood vessel lengths stay constant. The only possibility of blood vessel length changing is when we gain or lose weight. Through the process of vasodilation, or the smoothing of the blood vessel muscle, you can change the radius of the vessel more frequently. 2. Explain the effect that the change in blood vessel length had on flow rate. How well did the results compare with your prediction? Blood vessel length, when increased causes more friction or resistance thus making it more difficult for blood to flow through the vessel. In summation, increasing blood vessel length inversely effects flow rate but decreasing flow rate. My prediction was that an increase in blood vessel length would inversely effect blood flow. As evidenced in this experiment, with the increase of the blood vessel length, there was a decrease in blood flow. 3. Explain why you think blood vessel radius can have a larger effect on the body that changes in blood vessel length. In the blood flow equation (as seen to the right), blood flow is directly proportional to the fourth power of vessel radius. Dramatic changes happen in regards to blood flow because of small changes in blood vessel

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