Homeostasis
The maintenance of steady conditions. The ability of the body to maintain a constant internal environment, eg temperature and blood glucose concentration. maintains optimal conditions for A protein which catalyses or speeds up a chemical reaction. action throughout the body, as well as all cell functions.
In the human body, these include the control of:
- A simple sugar used by cells for respiration. concentration
- body temperature
- water levels
These automatic control systems may involve nervous responses (Body system that includes the brain, spinal cord and nerves.) or chemical responses (endocrine system).
Nervous system
The human nervous system consists of:
- the The part of the nervous system made up of the brain and spinal cord. – the brain and spinal cord
- the peripheral nervous system – nerve cells that carry information to or from the CNS
More guides on this topic
- QUIZ: The nervous system
- Coordination and control - The human endocrine system - AQA
- QUIZ: The human endocrine system
- Hormones in human reproduction - AQA
- QUIZ: Hormones in human reproduction
- Homeostasis in humans - AQA
- QUIZ: Homeostasis in humans
- Plant hormones - AQA
- QUIZ: Plant hormones
- Sample exam questions - homeostasis and response - AQA