Daniel B.
Izzy C.
Chapin W.
Then research scientific method:
a. What are the steps of each -
1. Make observations
2. Formulate a hypothesis
3. Design and perform experiments
4. Acept of modify hypothesis
5. Development into a law and/or theory
b. why we need it - We use the scientific method to collect measurable data and provides a
systematic, organized series of steps that help ensure objectivity and consistency in
exploring a social problem, as well as providing consistency.
c. what makes a test valid - an outcome that measures what it states to experiment with,
measure, and links to the intended focus
Then start working on each part
For your introduction make sure you answer:
a. What is homeostasis
Homeostasis is the tendency toward a relatively stable equilibrium between
interdependent elements, especially as maintained by physiological processes.
b. How does your specific way of homeostasis work?
Our homeostasis works by the heart pumping oxygenated blood to all parts of the
body it the contracts and sucks the deoxygenated back into the heart to be
reoxygenated
c. What organs are involved?
The heart, veins, arteries, and capillaries. The cardiovascular system is made up
of three primary parts: the heart, the arteries and the veins.
What hormones are involved? “The sympathetic nervous system (SNS) releases
the hormones (catecholamines - epinephrine and norepinephrine) to accelerate
the heart rate. The parasympathetic nervous system (PNS) releases the hormone
acetylcholine to slow the heart rate.”
(https://health.ucdavis.edu/sportsmedicine/resources/heart_rate_description.html)
d. What reaction does your body do? Accelerates or slows the heart rate
e.
For procedure do research on multiple ways before you decide your procedure and fill out
graphic organizer
Run around track twice
Hold breath underwater
Speed walking two laps
Procedure
Take heart rate before all three tests - perform tests three times
1.Run two laps
2.Record heart rate every 2 minutes after test until the original heart rate has been reached
---rest to recover heart rate to normal state---
3.Walk two laps
4.Record heart rate every 2 minutes after test until the original heart rate has been reached
---rest to recover heart rate to normal state---
5.Hold breath under water for one minute
6.Record heart rate every 2 minutes after test until the original heart rate has been reached
---rest to recover heart rate to normal state---
ABSTRACT - The purpose of our lab was to study how homeostasis affects the human body.
homeostasis is an organism’s process of maintaining a stable internal environment suitable for
sustaining life. our group chose how to show homeostasis in the circulatory system by recording
heart rate after running, walking, and holding our breath. After conducting three trials, we
concluded that heart rate through exercise proves homeostasis because heart rate has an increase
during physical activity and returns back to the normal state in roughly 4-8 minutes based on
cardiovascular health. During the trial one, the starting heart rate was 84 BPM, increasing to 156
BPM directly after running 2 laps around San Marin High School’s track, 108 BPM after 4
minutes, and then returned to 84 BPM 8 minutes after running. After gathering our data, we
concluded that homeostasis is relevant during physical activity because it helps humans maintain
a stable internal environment which we proved by examining heart rate after increments of time.
INTRO - Homeostasis in the circulatory system occurs when the heart pumps oxygenated blood
to all parts of the body. It then contracts and sucks the deoxygenated blood back into the heart to
be reoxygenated. This project’s reason for study increased our knowledge about homeostasis by
conducting a lab using multiple procedure steps to prove homeostasis is relevant in the
circulatory body system. Our hypothesis was if you run or walk, then your heart rate will
increase. We predicted heart rate will increase while running, walking, but decrease while
holding breath.
METHODS - Creating trials while walking, running, and holding breath, our group found out
how homeostasis affects the human body after exercising. When asked what are we going to do
for this project, we created a fool proof procedure to find all of our needed information. The
procedure consisted of a test on holding breath for a minute, run two laps on the track, and speed
walk two laps on the track. We chose these procedures because it was the most significant
procedure we could do at school to get the data we needed. Running, walking, and holding
breath create a controlled test for homeostasis. Homeostasis was found and proven by resting
after exercise to return our bodies to normal heart BPM.
RESULTS -
Procedure: Test by holding breath for a minute, running two laps around the track, and walking
two laps around the track.
Running Walking Holding breath
(1 minute)
Trial 1 84-start 82-start 80-start
156-end 104-end 76-end
108 after 4 minutes 84 after 2 minutes 80 after 2 minutes
84 after 8 minutes 82 after 4 minutes
Trial 2 80-start 80-start 80-start
140-end 100-end 80-end
104 after 4 minutes 84 after 2 minutes 80 after 2 minutes
80 after 8 minutes 80 after 4 minutes
Trial 3 86-start 92-start 72-start
160-end 104-end 80-end
112 after 4 minutes 96 after 2 minutes 72 after 2 minutes
86 after 8 minutes 92 after 4 minutes
DISCUSSION/CONCLUSION - From this lab we learned how to create detailed procedures,
explain our data, and learn more information on homeostasis. Our data proved homeostasis
because it shows a stable internal environment for humans in the circulatory body system. Our
procedure tested how the internal stability was relevant because of an increase in heart rate but
then it returned back to its original state.
WORKS CITED - https://opentextbc.ca/anatomyandphysiology/chapter/1-5-homeostasis/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4669363/
https://biologydictionary.net/homeostasis/
