4.4 Feedback continued

 

Today's Learning Objective(s):

·       Explain how positive and negative feedback helps maintain homeostasis.

#	Tasks:
1	Sample Questions - Feedback Use the Wayground task to check your progress on negative and positive feedback.
2	Modeling Blood Glucose Homeostasis Continue with the models. What loops would involve digestive / circulatory systems to maintain a constant supply of glucose? How can this be displayed in the model   Negative feedback; there is a set point for glucose in the blook. Model how the systems (and cell signals insulin and glucagon) work to maintain blood glucose levels.
3	Explanations – Blood Homeostasis Let’s look at the models that were created. Use a gallery walk to see the examples the different groups produced.
4	Parathyroid Hormone (PTH) Regulates Body Calcium Read about PTH and calcium in the body. In this example, negative feedback is used to keep calcium levels at an acceptable level in the blood. Answer the analysis questions.
5	Review  Parathyroid Hormone (PTH) Regulation Let’s see what we learned about this signaling pathway and feedback mechanism. Use the large sheet of paper to work in your teams.
6	Pre-Lab: Cell Communication Obtain a lab packet. Complete the pre-lab tasks. Homework if not completed in class.

 

Homework

Pre-lab: Cell Communication (not available digitally)

 

Upcoming Assessments

12/16/25 Quiz: Feedback

12/19/25 Quiz: Cell Cycle

12/22/25 Test: Cell Communication & Cell Cycle

 

Calendar Notes

12/24/25 – 1/4/26 Winter Break

1/5/26 School Resumes (unit 5 start)