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Regulation of Human Heart Rate Lab

Regulation of Human Heart Rate Lab. Intro/Directions. Introduction. 1. Why do you need to have a heart? Why do you need to have blood circulate to all parts of your body?. Answers. 1. You need a heart to pump blood.

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Regulation of Human Heart Rate Lab

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  1. Regulation of Human Heart Rate Lab Intro/Directions

  2. Introduction • 1. Why do you need to have a heart? Why do you need to have blood circulate to all parts of your body?

  3. Answers • 1. You need a heart to pump blood. • 2. You need blood to circulate to all the parts of your body in order for oxygen to get to all body cells (gas exchange) • Oxygen/ Carbon Dioxide exchange

  4. Introduction • How does your heart pump blood? What is a heart beat?

  5. Answers • The left and right ventricles pump blood to your body: ie cardiac muscle • The heart beat is the sound of two valves opening/closing in the heart.>>>>.LUB DUB LUB DUB

  6. Does your heart always beat at the same rate?

  7. Answer: • NO

  8. List some activities or stimuli that you think may increase a person’s heart rate.

  9. Answers • Lots of possible answers • Exercise; nervousness; etc.

  10. Why would it be useful for the heart to beat faster during these activities or in response to these stimuli?

  11. Answer: • You need blood to move faster! So heart needs to pump faster in order for the blood to deliver oxygen/glucose and pick up carbon dioxide.

  12. Are there any activities or stimuli that you think may decrease a person’s heart rate?

  13. Answers • Relaxing exercises • Yoga • Massage • Acupucture • Reflection

  14. Measuring Heart Rate Accurately • Steps to follow (use your lab sheet) • Measure pulse rate for 30 seconds • Multiply number by two

  15. GROUPS OF 4student jobs • SUBJECT (person we is getting pulse rate measured) • Measure pulse on left arm • Measure pulse on right arm • Use stop watch to time a 30 second interval • * if you have three people…one person must have two jobs!

  16. Accuracy • IF both people in group did not get same reading do it again until pulse rate is accurate.

  17. Designing your Experiment • Discuss with group ideas concerning activities or stimuli which may increase or decrease heart rate. • Choose a hypothesis that your group would like to test • Raise your hand when finished so I can check it!

  18. Plan your experimental procedure • Must be numerical…..1,2,3 etc

  19. Test your hypothesis

  20. conclusion • 1. Restate your Hypothesis • 2. Do you accept or reject your hypothesis? • 3. What was your average pulse rate? (activity or stimuli) • 4. Explain why the subject’s heart rate increased while they were performing the activity. Be specific • 5. IF we were to do this again, what would you change? (procedures)

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