D3.3 Homeostasis

SL and HL

Homeostasis introduction

Homeostasis means regulating the internal environment of a body. Ultimately, this means regulating the environment of cells.

TASK A Homeostasis challenge (Pairs)

Your challenge will be to try to keep all the parameters on green for 5 minutes.

Homeostasis simulation


How did the simulation game make you feel while you played it?

Note down three things you think you learned from this experience?




Negative feedback, temperature regulation and general homeostasis (Kognity D3.3)

Challenge activity Temperature regulation

Goal: Maintain a beaker of water at exactly 37 degrees celcius for 5 minutes.

Setup: Temperature probes, small beaker, access to hot, ambient water and ice.


  • Prepare a temperature probe and data logger where the setup is to take the temperature every minute for 5 minutes
  • Using the materials available, prepare a beaker of water with a temperature of exactly 37 degrees 
  • Press record.
  • Be prepared to respond to interventions to try and maintain a constant temperature as best as you can.

Reflections and FORMATIVE assessment

-Describe a response your team made to an elevated temperature (more than 37 degrees)

-Describe a response your team made to an descreasing temperature (less than 37 degrees)

LV 4 Negative feedback in the field of homeostasis is a response which counteracts a change. IN this lab, describe an action where your team modelled negative feedback in temperature control

LV 6 Using this lab as a model for temperature regulation in the human body, evaluate this model in terms how how accurately and sufficiently the model represents this process.

LV7 Using this lab as an inspiration for modelling temperature regulation and referencing published scientific studies on temperature regulation in another species (not humans), design and present a model for how the temperature regulation of a names species might be simulated under laboratory conditions.