Biology with Mrs. McGaffin



Name: _______________________ Period: ____ On Level Lab Investigation: Investigating changes in breathing and heart rate to determine how our body maintains homeostasis during exerciseTestable Question: What is the effect of _________________ on ______________________?Hypothesis:If you increase _____________________________, then ____________________________________ ___________________________________________________________________________________5534025123825Procedures:1) In a group of 3 people identify who will exercise, who will count the breathing rate and who take the pulse of the person exercising. (The person who exercises can take their own pulse and compare it with the number that their partner gets for their pulse). 2) Practice taking the exerciser’s pulse and breathing rate before beginning the experiment. Count the number of beats or breaths for 15 seconds. It helps if the person exercising sits up straight in a chair and rests their hand on their stomach. The person counting the breathing rate should be able to see their hand move.49053755524503) Have the exerciser sit down and take their resting pulse/breathing rate. Count for 15 seconds and then multiply your answer by 4. Record the numbers in the data chart.4) The student who is exercising should choose an exercise to do that they can sustain for 4 minutes (with short breaks in between for taking measurements). The exercise should be something that will cause their heart rate to increase (ex: jumping jacks, jogging in place, squats)5) The student who is exercising should start their exercise and do it for exactly one minute. 6) At the end of one minute the exerciser should immediately sit in their seat with good posture and put their hand on their stomach (to help with counting breaths). Count the pulse and breathing rate for 15 seconds. Multiply the number by 4 and record it on the data chart.7) Immediately repeat steps 5 and 6 three more times. (Fill in data for 2, 3 and 4 minutes)8) After filling in the data for 4 minutes the exerciser should continue to sit for 1 minute and group members should take the pulse and breathing rate for 15 seconds. Multiply the numbers by 4 and record data. 9) The exerciser should continue resting for 4 minutes. 5 minutes after exercising take the pulse and breathing rates for a final time and record on the data chart. Data Table: Changes in heart and breathing rate before, during and after exercise. Heart Rate(Beats/Min) X-AxisBreathing Rate(Breaths/Min) Y-AxisResting1 minute 2 minute3 minute4 minute1 minute after5 minutes after Graph your results on a separate sheet of paperGraph heart rate (beats per minute) on the X-axis and breathing rate (breaths per minute) on the Y-axis.NOTE: You are graphing breathing rate vs. heart rate. The amount of exercise time does NOT matter. It was only used as a stimulus to change your heart rate. The X-Axis Scale should contain start with a break and then have the lowest value for heart rate on the first line. The heart rate values should continue to increase by a SET amount until you have reached a line that contains the highest heart rate value. DO NOT just write down all of your heart rate values randomly on the X-axis. Each line on the X-axis should be worth the same amount. The Y-Axis scale should start with 0 and then increase by a SET amount until you have reached the value for the highest breathing rate. Each line on the Y-axis should be worth the same amount. Graph data points. Ex: Heart rate =72 bpm and breathing rate= 10 breaths/min (over 72 up 10). Your data points may not all fall exactly on a line. That is OK!!Look at your data and see if there is a relationship between heart rate and breathing rate. Draw a line of best fit if possible.Make sure that you gave your graph a title, labeled both axis and put in units (beats/min and breaths/min). Name: ______________________________________ Period: ________Heart Rate and Breathing Rate Lab Analysis Title:___________________________________________________________132399117747 384810313690Y-Axis Label: __________________________________00Y-Axis Label: __________________________________1483797175862X-Axis Label: _____________________________020000X-Axis Label: _____________________________Analysis:1) Use your data (numbers) to describe what happened to heart rate and breathing rate during exercise. 2) Is there a relationship between heart rate and breathing rate? Explain 3) Do you have any data points that are outliers (numbers that don’t fit the pattern)? If so, what explanation do you have for that data point? (Was there any error in counting?)Conclusion: Does heart rate affect breathing rate? Give data from this lab to defend this statement. Why would your heart rate affect your breathing rate? What systems are involved in this process?Claim:Heart rate ________________ (does/ does not) affect breathing rate. Evidence: This is shown in the data. At rest the average heart rate was _________ and the breathing rate was _________. After exercise, the heart rate increased to ________ the breathing rate to_____________________________________. The highest heart rate we recorded was ________ and this produced a breathing rate of ___________. Reasoning: The reason for this is because as you exercise your body needs _____________________________________________________________. The heart pumps blood and brings the __________________and ________________________ to the cells. The systems that are involved in this process are (identify 3) ________________________________________________ ___________________________________________________________________________________Explain what each of the systems do to help maintain homeostasis during exercise: _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ................
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