Name:___________________________
Date:______________
Name:___________________________
Homeostasis Activity
Directions:
Study the paper with a set of descriptions that are part of a homeostatic
mechanism. You and your partner’s job is to cut out the 6 descriptions and
form a negative feedback concept map with them. Paste them on the back
of the paper. Make sure arrows are used to show the pathway of the
negative feedback loop. Use the concept map below as a guide for yours.
Once your map is done, answer the questions together being as complete as
possible.
Create and paste your
homeostasis feedback concept
map on the back of this
paper.
Questions: COMPLETE SENTENCES ONLY!
1. What is homeostasis?
2. What is the set point of your homeostasis map?
3. Based on your homeostasis map, what are 2 ways homeostasis could
be disrupted?
4. Based on your homeostasis map, how can homeostasis be restored?
5. Why is it important for living things to maintain a relatively stable
internal environment?
6. Besides the example from your homeostasis map, describe 3 other
ways that the human body’s internal homeostasis can become
disrupted?
Blood Pressure Regulation
Blood pressure normal range is 120/80
Body Temperature Regulation
Body temperature norm is 98.6 degrees F
Blood Glucose Regulation
Blood glucose normal range is between 80-100mg/dl
Beta receptor cells in pancreas
detect a rise in blood glucose
levels.
Beta cells in the pancreas release
the hormone insulin into the
bloodstream.
Alpha receptor cells in the
pancreas detects a decrease in
blood glucose.
Alpha cells in the pancreas
release the glucagon hormone
into the bloodstream.
Blood Calcium Regulation
Blood calcium normal range is between 9-10.5mg/dl
An increase in blood calcium
is detected by receptors in
thyroid gland.
The receptors in the
parathyroid gland detect a
drop in blood calcium.
Thyroid gland releases
calcitonin hormone into
bloodstream.
The parathyroid gland
releases PTH into the
bloodstream.
Calcitonin deposits excess
calcium into bones, lowering
calcium levels in the blood.
PTH causes the bones to release
calcium into the blood and the
intestines to absorb more
calcium, thus, raising blood
calcium levels