B10 - The Human Nervous system.

B10 - The Human Nervous system.

• regulation of the internal conditions of a cell or organism to maintain conditions for function, in response to internal and external conditions.
• Important for maintaining conditions for enzyme acttions and cell functions. 
• human homeostasis controls blood glucose levels, temperature and water levels.
• automatic control systems - nervous or chemical responses
• all conrol systems - receptors, coordination cnetres, effectors.

• Electrical impulses - react quickly to surroundings and coordinate behaviour. 
• Receptors - detect chnages in the environment
• Impulses from receptors along sensory nuerones to brain or spine.
• The brain coordinates response and impulses r sent along the motor nuerones.

• Automatic and rapid and dont involve concious brain parts.
• sensory,relay and motor nuerones. 
• control everyday bodily functions - breathing, digestion and help avoid danger.
• stimulus - receptor - sensory nuerone - relay nuerone - motor nuerone - effector - response