Monday, February 13, 2017

Heart Smart Lab

Guiding Question:
How does the environment alter heart rate?

We just learned about the heart and how it works. We conducted an experiment to see how the heart would work when we were scared or nervous. We decided to watch a horror movie trailer and then we recorded our heart rates before and after. We learned that our heart rate increases because of a process called fight or flight. The process increases your breathing and heart rate to help your muscles move faster so you can either fight fear or run away.
- Lindy and Maria

In the Heart Smart ADI Lab, we compared how different levels of stress effects the heart rate. To do this, we solved math worksheets on different time limits. For the first trial, we had 30 seconds; for the second trial, we had 60 seconds; and for the third trial, we had 90 seconds. Once we complete down the experiment, we found that the heart rate for the first trial was much higher than the second and third trials. We learned that this was because stress triggers the body's "fight-or-flight" response. This results in an increased production of adrenaline, which releases sugar into the body. This sugar makes a person more energetic, and have a higher heart rate.
- Joanne

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