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Exercise 1: Baseline Data
Using the Horizontal Compression buttons and the scroll bar, display the data for Exercise 1 you wish to include in your report. |
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ECG and Cardiac Cycle| |Time between QRS and the Startof Ventricular Contraction (s)|
1|1.48|
2|1.48|
3|1.46|
4|1.48|
5|1.48|
Mean|1.47|
Observe the heart and describe its behavior. Is this behavior consistent with what is shown in the data above?
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Study Questions
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1. Explain the basis for the delay between the atrial and ventricular contractions.
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2. Describe the relationship between the ECG QRS complex and the beginning of ventricular contraction. What is the physiological significance of this relationship?
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Exercise 2: Effect of temperature
Using the Horizontal Compression buttons and the scroll bar, display the data for Exercise 2 you wish to include in your report. |
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Effect of Temperature on Frog Heart Rate| |Temperature(°C)|Heart Rate(BPM)|CalculatedQ10|Cold|3|31.3||Room Temp|19|42.1|1.2|Warm|37|54.0|1.1|||
Describe the effects that you observe of changing the temperature of the solution bathing the heart as it lies wihin the thorax.
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Study Questions
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1. How did temperature affect heart rate? What do you suppose is a consequence of being a poikilotherm?
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2. Why is the Q10 a useful concept?
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Exercise 3: Starling's law of the heart
Using the Horizontal Compression buttons and the scroll bar, display the data for Exercise 3 you wish to include in your report. |
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Effect of Stretch|Degree ofStretch|Heart ContractileForce (N)|0|0.015|1|0.011|2|0.017|3|0.021|4|0.017|5|0.057|||
Study Questions
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1. What is Starling's Law of the Heart? Does your data support this law?
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2. During exercise, venous return of blood to the heart increases. Based on your knowledge of Starling's Law, what
