4.6.10 The role of negative feedback in maintaining systems within narrow limits

Negative feedback systems aim to keep something (e.g. blood [glucose] or body temperature) at a constant level.

Negative feedback works as follows;

1. Signal causes action

2. Action has effect

3. Effect removes original

E.g.

1. High [glucose] in blood causes insulin release

2. insulin stimulates liver to take up glucose & convert it into glycogen stores

3. [glucose] falls