Solved by ramonistry
Exercise 5: Cardiovascular Dynamics: Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
- The heart is resting during
You correctly answered: c. ventricular diastole. - The right side of the heart pumps blood
You correctly answered: d. to the lungs. - The layer of the blood vessel that is stimulated by the autonomic nervous system is
You correctly answered: b. smooth muscle. - In the experiment, the pump simulates
You correctly answered: b. the left ventricle of the heart. - If the right beaker simulates the flow of blood to the systemic circuit of the body, what do the right valve and flow tube
represent?
You correctly answered: d. aortic valve and aorta
09/02/15 page 2
Experiment Results
Predict Question:
Predict Question: If you increase the flow tube radius, what will happen to the pump rate to maintain constant pressure?
Your answer : a. The pump rate will increase.
Stop & Think Questions:
When the piston of the pump reaches its lowest point, the volume remaining in the pump is the
You correctly answered: b. end systolic volume.
If you increase the right flow tube radius, what will happen to resistance and flow rate?
You correctly answered: b. Flow rate will increase and resistance will decrease.
If the left flow tube represents the pulmonary veins, what does the left source beaker represent?
You correctly answered: d. blood coming from the lungs
Experiment Data:
Flow (ml/min) Rad. L (mm) Rad. R (mm) Str. V (ml) Rate
(strokes/min)
Press. L (mm Hg) Press. Dif. R (mm Hg)
6607.2 3.5 3.0 70 94.9 40 40
9423.9 3.5 3.5 70 134.6 40 40
11882.5 3.5 4.0 70 169.8 40 40
13798.3 3.5 4.5 70 197.1 40 40
15198.7 3.5 5.0 70 217.1 40 40
Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
- The pump piston in the simulation is up during
You correctly answered: b. diastole. - The pump in the simulation represents the
You correctly answered: c. left ventricle. - The amount of blood flowing into the destination beaker (right beaker) with a single pump is called the
You correctly answered: d. stroke volume. - In this experiment, the increase in right flow tube radius resulted in
You correctly answered: b. an increase in flow rate, which increased the pump rate. - Which chamber should be present in the flow pattern of the experiment, given that the vessels and valves surrounding it
are present (the chamber was omitted from the experiment for simplicity)?
You correctly answered: d. left atrium
Review Sheet Results
- Explain the effect of increasing the right flow tube radius on the flow rate, resistance, and pump rate.
Your answer:
By increasing the right flow tube radius, flow rate increased, resistance decreased and pump rate increased. - Describe what the left and right beakers in the experiment correspond to in the human heart.
Your answer:
Left beaker is lung, middle beaker is left heart and right beaker represents body system. - Briefly describe how the human heart could compensate for flow rate changes to maintain blood pressure.
Your answer:
When flow rate increases, the heart pumps more faster to maintain bloood flow.