5.1 Homeostasis Flashcards
1
Q
What is homeostasis? (1)
A
- The regulation of internal conditions, of a cell or organism,
- to maintain optimum conditions for functions
- in response to internal and external changes.
2
Q
What does homeostasis maintain? (1)
A
The optimal conditions for enzyme action/activity and all cell functions.
3
Q
What are examples of conditions maintained by homeostasis? (3)
A
- Blood glucose concentration
- Body temperature
- Water levels
4
Q
What types of responses are used in all body control systems? (2)
A
- Nervous responses
- Chemical responses
5
Q
What components do all control systems include? (3)
A
- Receptor
- Coordinates centres
- Effectors
6
Q
What is a receptors? (1)
A
Cells which detect stimuli (change in the environment).
7
Q
What are coordination centres?
A
Organs (such as the brain, spinal cord and pancreas) which receive and process information from receptors.
8
Q
What are effectors? (1)
A
Muscles or glands which bring about responses that restore optimum levels.
