Building a Model

What is a MODEL? Set of ideas that explains a natural phenomena Always subject to change –New discoveries/New data

Model Criteria Match and explain observations Realistic Simple Use it to make predictions

I WORK OUT!!!! L. Coleman; J. Horton; H. Parker 2014

Measuring Heart Rate

Resting Heart Rate As a class lets take our resting heart rate! Count for 20 seconds. Multiply by 3 to get beats per minute. Record in Doodle A.

Collect Data Heart Rate (beats per minute) Resting Immediately After Exercise 5 Minutes After Exercise Record your data in the Class Data Table. After resting for 5 minutes, take your heart rate again. Exercise vigorously for two minutes, then without sitting down, take your heart rate. (have a partner watch the time for you while you count!)

Class Data StudentRestingAfter ExerciseAfter Rest

What patterns do you see in the class data? There was a lot of 90’s and above on the second category 75 was a common resting rate Resting always lowest Exercising causes HR to increase (120 bpm) Small, big, medium People with lower resting HR have lower numbers 5 minutes after exercising was higher than resting HR Doodle B

What patterns do you see in the class data? After exercise is the largest Lowest to highest back to low Resting HR always the lowest After rest is above resting HR Doodle B

What patterns do you see in the class data? After exercising highest Resting HR is the lowest After rest is in the middle Doodle B

What patterns do you see in the class data? Resting = lowest, exercise = highest, after rest = middle Resting was around the same Everyone’s exercise was the highest Different HR even though same exercise time Doodle B

What patterns do you see in the class data? HR is twice as high after exercise Resting HR is lowest After rest HR is usually higher than resting Doodle B

What patterns do you see in the class data? After a break your HR is higher than resting Exercise HR is the highest Resting HR is the lowest Trend is low high to medium. Doodle B

What questions could you ask about the patterns seen in the class data? How can you tell if someone is more fit? What causes your HR to rise? Why is your after 5 min HR higher than resting? Why is your HR higher after exercising? Driving Question: What causes your HR to rise? Doodle C

What questions could you ask about the patterns seen in the class data? Why could someone’s HR be lower after exercise? Why is everyone’s HR different after exercise? Why does it lower after 5 minutes of rest? How long would it take for it to return to resting? Driving Question: Why is everyone’s HR different after exercise? Doodle C

What questions could you ask about the patterns seen in the class data? Why do HR’s differ? What does HR determine? Why is the after rest still high? What causes your HR to lower? Driving Question: What causes your HR to lower? Doodle C

What questions could you ask about the patterns seen in the class data? Why was there a large spike in HR? Can two people have the same HR? How does your HR increase? Why did we wait five minutes? Driving Question: How does your HR increase? Doodle C

What questions could you ask about the patterns seen in the class data? Would everyone’s HR be similar if we did the same exercise? What is the maximum HR? Is there a way to lower exercising HR? Why does HR increase during exercise? Driving Question: Why does HR increase during exercise? Doodle C

What questions could you ask about the patterns seen in the class data? Why even after rest is your HR still higher than original? How long does it take to get your HR back to normal? What causes your HR to rise rapidly? Driving Question: What causes your HR to rise rapidly ? Doodle C

What does the heart do? Pumps blood through arteries and veins Keeps us alive Circulates oxygen/carbon dioxide Pumps to all organs Doodle D

What does the heart do? Pumps blood throughout the body Needs to beat to keep us alive Oxygen and water transported around Carries cells Love <3 Doodle D

What does the heart do? Pumps blood to lungs to get oxygen Doodle D

What does the heart do? Pumps blood through the body Oxygen, minerals Doodle D

What does the heart do? Provides ATP by circulating oxygen Pumps blood for life Doodle D

What does the heart do? Pumps your blood Doodle D

Where is the heart pumping blood to? Pumps blood to cells Doodle E

Where is the heart pumping blood to? To our organs Doodle E

Where is the heart pumping blood to? To your body’s cells Doodle E

Where is the heart pumping blood to? Delivering it to your cells! Doodle E

Where is the heart pumping blood to? Blood to all of your cells Doodle E

Where is the heart pumping blood to? Your organs, tissues, and cells. Doodle E

Why do the cells need blood? To keep our body working For energy For oxygen Doodle F

Why do the cells need blood? Fight off infection To deliver oxygen Doodle F

Why do the cells need blood? To not die Provides oxygen Doodle F

Why do the cells need blood? Without blood you die without oxygen Doodle F

Why do the cells need blood? Oxygen Nutrients Doodle F

Why do the cells need blood? To get oxygen for life Doodle F

Which of these materials would a cell need more of during exercise? Oxygen Doodle G

Which of these materials would a cell need more of during exercise? Oxygen! Doodle G

Which of these materials would a cell need more of during exercise? Oxygen Doodle G

Which of these materials would a cell need more of during exercise? Oxygen Doodle G

Which of these materials would a cell need more of during exercise? Oxygen! Doodle G

Which of these materials would a cell need more of during exercise? Oxygen Doodle G

Why does the heart pump faster during exercise? Doodle H To deliver more oxygen

Why does the heart pump faster during exercise? Doodle H Using oxygen quickly so you need to deliver more

Why does the heart pump faster during exercise? Doodle H Feed more oxygen to your cells Keep up with demands

Why does the heart pump faster during exercise? Doodle H Higher activity requires more oxygen

Why does the heart pump faster during exercise? Doodle H We need more oxygen

Why does the heart pump faster during exercise? Doodle H To pump oxygen through your body

Ticket Out The Door Explain why your heart rate eventually decreases after exercising. Doodle I

How does your heart know that it needs to speed up or slow down? Diagram where the information to speed up or slow down your heart rate comes from and where it has to go to by using arrows on your doodle sheet. You can add any words or structures that you think may be involved in addition to what is shown on the Doodle Sheet. Doodle I

Lets Flush This Out! Reading: Control Of Heart Rate – Paired Reading – Text Mining

Putting It All Together On your white board use the manipulatives to create a map of the flow of information that will help you answer our driving question. Start with the muscle cells Use arrows to show the direction information is flowing. To help you have out your – Doodle Sheet – Reading: Control Of Heart Rate – Summary Sheet: Control Of Heart Rate

Assessment Draw the diagram you and your grouped mapped out and your teacher approved on the paper provided. Once you have your diagram, flip the paper over and answer the driving question. This is an individual explanation not a group write.

Feedback Diagram The Feedback Diagram Handout gives general terms for the important components of feedback loops. On your handout, note below each term which specific component, of the heart rate feedback loop you just described, plays that role.

NEXT….. Students can now apply their model to other feedback loops. Present them with a reading of another feedback loop and see if they can identify the different components and explain what is going on.