Heart Rate What Does the Pumping Mean?

State Science Content Standard Students will recognize and provide examples that human beings, like other organisms have complex body systems of cells, tissues and organs that interact to support an organism’s growth and survival. –Select several body systems and explain the roll of cells, tissues and organs that effectively carry out a vital function for the organism, such as Obtaining food and providing energy (digestive, circulatory, respiratory Breathing (respiratory, circulatory)

Objective By the end of this lesson, you will be able to analyze data in order to determine the relationship between heart rate and the raw materials needed for cellular respiration (to create energy)

Benchmarks for Science Literacy The Living Environment –Cells: All living things are composed of cells; tissues and organs are made of different kinds of cells. Cells repeatedly divide to make more cells for growth and repair. Various organs and tissues function to serve the needs of cells for food, air and waste removal Within cells, many of the basic functions of organisms- such as extracting energy from food and getting rid of wastes are carried out. The way in which cells function is similar in all living organisms

Prior Knowledge Organelles Osmosis/Diffusion Cellular Respiration –Glucose/ Oxygen creates energy –More energy used, more raw materials used, so more needed Photosynthesis –Provides the oxygen needed for CR

Technology Standard 6.0 Students will demonstrate the ability to use technology to develop strategies to solve problems and make informed decisions –Understand the Problem –Devise a Plan –Carry out the Plan –Analyze Data –Communicate Conclusions

Heart Rate and Exercise You will monitor your heart rate before, during and after exercise. –Standing heart rate –Maximum heart rate –Recovery time after exercise

In Your Groups Using the LabQuest: –Stand facing the table Grasp the handles of the heart rate monitor –The arrow needs to be facing the receiver Click “Collect” to determine if the sensor is working properly –There will be a 15 second delay before the first point is plotted. –Data will be plotted every five seconds after the initial reading –Readings should be consistent between 55 and 90 BPM Click “Stop”

Standing Heart Rate Student stand quietly for about a minute –Click “collect” –There will be a 30 second delay –Point will be plotted every 5 seconds for 100 seconds (minute and a half)

Exercise After 100 seconds, immediately start to exercise –Place your right foot on the step –Place your left foot on the step –Place your right foot on the floor –Place your left foot on the floor –Continue for 100 seconds

Recovery Time After 100 seconds of stepping, stop stepping Stand quietly for 200 seconds Data collection will end automatically

Calculating Standing Heart Rate While on the graph –Move the mouse pointer to the 0 second line –Press the mouse button and hold it down as you drag across the graph to the 100 second line to select this part of the graph –Click the “Statistics” button. Record the Mean (average) standing heart rate (in bmp) –Close the stats box

Calculating Maximum Heart Rate Click on the “Examine” button Move the cursor to the highest point on the graph Record the heart rate (HRT) displayed for this point

Calculating Recovery Time Start at the 200 second line, move the cursor to the right Stop where the displayed heart rate first reads within 3 bpm of the Step 10 value Record the time (to the nearest second) for this point Close the “Examine” box

Compare and Analyze Create a data table like the one below: Subject’s Name Standing Heart rate Max heart rate Time at return to within 3 bpm of standing rate Recovery Time in seconds

Analysis How does your maximum heart rate compare to other students in your group? Is this what you expected? How do you account for this? How does your recovery time compare to the other students in your group? Is this what you expected? How do you account for this? Why would athletes need to work longer and harder before their heart rates were at the maximum value?