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Peristalsis is a series of rhythmic contractions and relaxations of the smooth muscle tissue within the digestive system. This action moves food through the tubular organs of the digestive tract. To observe peristalsis, click and drag the food to the mouth of the pig.
The skeleton not only provides shape, support, and protection, but it also works with our muscular system to enable movement. Skeletal muscles usually function in opposing pairs called antagonistic muscles. Click on the biceps of the pig to observe this action.
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The Effects of Exercise On Carbon Dioxide Levels
Name:
Date:
Period:
Purpose:
To determine the effect of exercise on CO2 levels exhaled by mammals.
Procedure:
Drag the slider to select an exercise level. Press Start. When the exercise is done click on the Bubble button to collect the CO2 that is exhaled. When the bubbles have stopped, click the phenolphthalein bottle and add 3 drops of this indicator to the beaker. Then add drops of sodium hydroxide (NaOH) until the solution turns pink. Record the number of drops of sodium hydroxide below. Repeat until all four exercise levels have been tested.
Data:
Exercise Level
Drops of NaOH
Resting
Light
Moderate
Vigorous
Analysis: Graph your results.
Parts per million of CO2
360 320 280 240 200 160 120 80 40 0
Resting
Light
Moderate
Vigorous
Exercise Level
Conclusion:
1. Which exercise level produced the most CO2? Explain your answer.
2. Which exercise level produced the least CO2? Explain your answer.
Heart Rate Recovery Lab
Name:
Date:
Period:
Purpose:
To compare heart rate recovery time after various levels of exercise.
Procedure:
Click on the exercise button and drag the slider to select an exercise level. Press Start. When the exercise is done click the recovery button and drag the recovery time slider. Click the pulse button and count the heart rate for 15 seconds. Record the heart rate in the table below. Record the rate of each recovery time for each exercise level.
Beats/Minute
Data:
Exercise Level
Recovery Time 1 minute 2 minutes 3 minutes 4 minutes
Resting
Light
Moderate
Vigorous
Analysis: Graph your results.
Heart Rate - Beats/minute
130 120 100 90 80 70 60 50 40 30
1
2
3
4
Recovery Time
Conclusion:
1. Which exercise level required the greatest recovery time? Explain your answer.
2. Which exercise level required the least recovery time? Explain your answer.