4.5.1 Homeostasis Flashcards
1
Q
What is homeostasis?
A
- regulation of the internal conditions of a cell or organism
2
Q
What does homeostasis maintain?
A
- optimum conditions (stable internal environment) for function in response to internal and external changes and enzyme action
3
Q
What does homeostasis have control of in the human body?
A
- blood glucose concentration
- body temperature
- water levels
4
Q
What are an automatic control systems role?
A
- regulate internal environment
5
Q
What may automatic control systems involve?
A
- nervous responses (nervous system)
- chemical/hormonal responses (endocrine system)
6
Q
What do all control systems include?
A
- receptors
- coordination centres
- effectors
7
Q
What are receptors?
A
- cells that detect stimuli (change in environment)
8
Q
What are coordination centres?
A
- centres which receive and process information from receptors
9
Q
What are examples of coordination centres?
A
- brain
- spinal cord
- pancreas
10
Q
What are effectors?
A
- an organ or cell that brings about responses which restore optimum levels
11
Q
What are examples of effectors?
A
- muscles
- glands
