1.11 Need for communication
- Created by: JTY3
- Created on: 16-03-16 21:17
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- The Need for Communication
- Keep cells active
- Cellular activity relies on enzymes performing their functions effectively
- Their are several factors which affect the efficiency of an enzyme
- Temperature
- pH
- Aqueous environment that holds substrates and products in solution
- Freedom from toxins and excess inhibitors
- Their are several factors which affect the efficiency of an enzyme
- Cellular activity relies on enzymes performing their functions effectively
- Stimulus and response
- External environments
- Change in the environment is the stimulus
- Change in the animals behaviour or physiology is the response
- Internal Environment
- In animals the fluid which cells and tissue is bathed in is the environment
- Metabolic activities consume substrates and produce products.
- Toxic products diffuse out the cell and into the tissue fluid altering the cells environment.
- Cells internal environment is maintained by blood flow.
- External environments
- Coordination
- Multicellular organisms require a good communication system
- This ensures different parts of the body work together effectively
- A good communication system will do several things
- Cover the whole body
- enable cells to communicate with each other
- enable specific communication
- enable rapid communication
- enable both short and long term responses
- Multicellular organisms require a good communication system
- Cell Signalling
- The process in which one cell will release a chemical to be detected by another
- Two major systems of communication that work by cell signalling
- The Neuronal system is an interconnected network of neurones
- signal eachother across synapse junctions
- Can conduct signals very quickly and enable rapid responses.
- The Hormonal system uses the blood to transport its signals
- Cells in an endocrine organ release hormones directly into the blood.
- The hormone is carried all over the body but only recognised by soecific target cells.
- Cells in an endocrine organ release hormones directly into the blood.
- The Neuronal system is an interconnected network of neurones
- Keep cells active
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