Topic 5 Homeostasis Flashcards
What is homeostasis
Regulation of the conditions inside the body, to maintain a stable internal environment in response to changes in both internal and external conditions
Why is it important to have a stable internal environment
Cells need the right conditions in order to function properly, including the right conditions for enzyme action
What are two types of automatic control systems in your body
Nervous and hormonal communication
What can control systems maintain
Your body temperature
Blood glucose level
Water content
What are all automatic control systems made up of ( 3 main components)
Receptors
Coordination centres (including brain, spinal cord and pancreas)
Effectors
What is negative feedback used for
When the level of something gets high or low the body uses negative feedback to bring it back to normal
What happens if a receptor Detects a stimulus is too high
The coordination centre receives and processes the information then organises a response
Effector produces a response which counteracts the change and restores the optimum level (the level decreases)
What happens if a receptor detects the stimulus is too low
The coordination center Receives and processes information and then organises a response
Effector produces a response which counter acts the change and restores the optimum level (the level increases)
For how long will the effectors continue producing the response
For as long as they are stimulated by the coordination centre
What problem might the effectors producing response whilst they are stimulated cause
Make the level change too much away from the ideal
What happens if the level changes too much
The receptor detects is the level becomes two different and negative feedback starts again
What kind of process is this
Automatic
