The Body's Negative Feedback Loop
Biology: AQA GCSE Higher, topic 5.1.4
Positive Feedback
Positive feedback is the opposite of negative feedback. It makes a small change even bigger. An example of positive feedback in the body is the release of oxytocin (hormone), which increases the number of contractions during childbirth.
Test yourself on The Body's Negative Feedback Loop
What will happen if our body temperature rises well above 37°C?
Which of the following are true of negative feedback in the body?
What is the optimum human body temperature?
Which type of feedback makes a small change in the body even bigger, instead of reversing it back towards normal?
What happens when the body's internal conditions are already at the optimum?