Length: 10 minutesComplexity: Easy

Appreciation of the fundamental role of homeostatic mechanisms in physiology: -- Negative feedback via receptors, comparators & effectors based upon a ‘set point’ -- The ‘set point’ as being a narrow range of values within which normal function occurs -- The principle of oscillations within the feedback loop based upon lag time in feedback. -- Positive feedback as an amplification process: its instability and consequences of this.