HOMEOST SIS
tips and instructions
I created this packet for teaching Homeostasis because it was a topic that has the capability of being very
boring for students.
The first worksheet starts off with establishing the norms of various biological processes. Instead of simply
writing in the ranges, I thought it would be more interactive if the students charted their findings. We
actually ended up using this document during the section on vital signs as well. I did not create an Answer
Key for this because I know that norms vary from source to source. My students do an internet search for
their answers, but many textbooks contain the values as well. I have included a detailed instruction sheet
to help the students fill this out. I didn’t want to “bog down” the worksheet with the instructions, so I made
it a separate document. I actually just put it under the Elmo and project it instead of handing each student
out a copy.
The next section goes over positive and negative feedback. I wanted to focus more on negative feedback
since most body processes deal with this. Again, I used a lot of graphics and color coding to keep the
worksheet a little more interactive.
The final page is a lab you can do with heartrate. The students tend to really enjoy the activity and it is one
of the parameters the worksheet focused on. The lab is somewhat simple, so I included the graphing of the
results to focus on those standards as well. The one thing I would make sure is that the students are
proficient in taking a pulse rate. Otherwise the results can be off.
I chose to have them do a 60 second count for the resting because the accuracy is very important.
However, for the post exercise I chose to have them just do a 10 second count to make sure the heart rate
stays elevated. Some of your more athletic students’ heart rates will come down so quickly that it is
important to get a reading quickly.
I hope you enjoy this activity! Please let me know if you have any questions or concerns!
purposefulpedagogymail@gmail.com
@hspurposefulpedagogy
HOMEOST SIS
the book of norms
Name: __________________________________________________________ Date: ___________________
Heart Rate (bpm)
60
50
70
80
90
100
110
120 130 140
7.49
7.47
blood ph
40
blood
pressure
(mmHg)
96o
97o
98o
99o
100o
7.45
7.43
7.41
7.39
7.37
7.35
body temperature (Of)
BLOOD
GLUCOSE
(mg/dL)
31
30
29
28
27
26
25
24
23
BLOOD
co2
(mEq/L )
11.6
11.1
10.6
10.1
9.6
9.1
serum
8.6
8.1
calcium
(mg/dL )
oxygen
saturation
(%)
7.6
+ feedb ck Name: __________________________________________________________ Date: ___________________
COUNTER
RESPONSE
RESPONSE
RESPONSE
Homeostasis feedback can
be positive or negative. To
the right are picture
representations of the two
types of feedback.
Determine which picture
represents positive feedback
and which represents
negative feedback and write
them in the boxes below.
A change in heart rate is an example of NEGATIVE FEEDBACK. Fill in the Response and Counter Response with
either Epinephrine (EPI) or Acetylcholine (ACh). Next, select colors for each of the steps and then color code
the diagrams.
STIMULUS
RECEPTOR
CONTROL
CENTER
EFFECTOR
RESPONSE
Pick two of the variables from the first two pages and fill in the “Negative Feedback Loop” for each of them.
HOMEOST SIS
the book of norms
Instructions and guide
For each of the variables, you will find values for an adult. Ranges could vary so make
sure you are using a reputable source.
Heart Rate: Find the normal range for heart rate in adults and color in
the range on the ruler.
Blood Pressure: Find the normal ranges for systolic and diastolic
blood pressure for adults and fill in the dial with the correct ranges.
Blood pH: Find the normal ranges for blood pH and color in the vial to match the range.
Blood pH: Find the normal ranges for temperature in adults and like the heart rate, color
in the range on the thermometer.
Blood Glucose: Find the normal ranges for blood glucose in adults.
The upper number of the range will go on the “high value”
glucometer. Shade in the numbers in the blanked out digital
numbers. Do the same with the lower number of the range with the
“Low Value” glucometer.
Blood CO2: Find the normal ranges for CO2 blood levels and shade in and fill up the lungs
using the number lines as a guide.
Serum Calcium: Find the normal ranges for serum calcium levels and shade in and fill up
the bone using the number lines as a guide.
Oxygen Saturation: Find the normal ranges for oxygen saturation levels and complete in
the same way the Blood Glucose was done.
HOMEOST SIS
Heart Rate Lab
Name: __________________________________________________________ Date: ___________________
Purpose:
Observe and record homeostasis occurring with heart rate response.
Materials needed:
Stopwatch (or stopwatch function on cell phone)
Procedure:
1. Pick a partner and decide who will be exercising first. The non-exerciser will monitor the stopwatch
during this round. Have the exerciser sit quietly for at least 3 minutes. At the end of three minutes, take
a radial pulse for one full minute. Record in the table on the Data page.
2. Have your partner take your heart rate for one full minute. Have the
exerciser run the stopwatch. If there is more than a 5-bpm difference, repeat
steps 1 and 2.
3. Once the values have less than a 5-bpm difference, find the average of the
two numbers and record.
4. Have the exerciser do an aerobic activity for 3 minutes. Jogging in place,
doing jumping jacks or any activity that will raise your heartrate will be
acceptable.
5. At the end of 3 minutes, have the exerciser immediately sit down. Within 10 seconds, have the exerciser
take their pulse for 10 seconds. Multiply this number by 6 or look at the conversion chart on the Data Page.
Record on the table.
6. After 1 full minute, repeat the process of taking a 10 second pulse and record. Do the same at minute 2
and minute 3. Record findings on Data page.
7. After the last pulse monitoring, wait a full 5 minutes and record findings.
8. Take all 5 heart rate recordings (average resting HR, immediately post HR, 1-minute post HR, 2-minutes
post HR, 3-minutes post HR and 8-minutes post HR) and graph results on Data page.
9. Repeat this exact same process for the non-exercising partner.
HOMEOST SIS
Heart Rate Lab Data
Name: __________________________________________________________ Date: ___________________
Resting Heart Rate
Post exercise Heart Rate
1. Was your resting heart rate within normal limits? ___________
2. Why would our heart rates need to increase during exercise? ___________________________________
________________________________________________________________________________________
3. How long did it take for your heart to return to resting homeostasis? _____________________________
4. How do you think your results would compare with an elite athlete? _____________________________
________________________________________________________________________________________