Name the variable
Start by defining what the system is controlling. A feedback loop has no meaning until the regulated variable and its acceptable range are clear.
HOMEOSTASIS AND FEEDBACK
Hold the variable.
Follow the loop.
Homeostasis is organised regulation, not a static “normal.” This note gives the mental model; verify system-specific values and exceptions in your approved source.
Trace information
Connect sensor, input signal, integrator, output signal and effector. This is the route from disturbance to response.
Read the direction
Ask whether the response opposes or amplifies the initial change. State the time scale and stop condition rather than naming feedback alone.
Add the context
Activity, environment, age and illness can shift a system’s response. A model is useful only when its assumptions are visible.
RECALL CHECK
Can you redraw the loop?
Try the original check before reopening your source. Then draw one source-backed example in your own revision notes.