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29 Ventilation Heart Rate

29 Ventilation Heart Rate - Experiment Ventilation and...

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Biology with Calculators 29 - 1 Experiment 29 Ventilation and Heart Rate In this experiment, you will investigate the effect of altering the levels of oxygen and carbon dioxide on the rate at which the heart beats. Two different methods of ventilation will be used to investigate this phenomenon. The first method, hyperventilation , is when the breathing rate of an organism is greater than what is necessary for proper exchange of oxygen and carbon dioxide. This will be achieved by a period of rapid breathing by the test subject. The second method, hypoventilation , occurs when there is a decrease in ventilation without a decrease in oxygen consumption or carbon dioxide production by the body. True hypoventilation is usually the result of a disease. The test subject will simulate this condition by holding his or her breath for a period of time. Heart rate will be monitored using the Exercise Heart Rate Monitor. MATERIALS LabPro or CBL 2 interface Vernier Exercise Heart Rate Monitor TI Graphing Calculator Dropper bottle with saline solution DataMate program PROCEDURE Each person in a lab group will take turns being the subject and the tester. When it is your turn to be the subject, your partner will be responsible for recording the data on your lab sheet. 1. Elastic straps, for securing the transmitter belt, come in two different sizes (small and large). Select the size of elastic strap that best fits the subject being tested. It is important that the strap provide a snug fit of the transmitter belt. 2. Wet each of the electrodes (the two grooved rectangular areas on the underside of the transmitter belt) with 3 drops of saline solution.
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