IGCSE Biology
- Created by: Hamzahhp
- Created on: 18-04-18 19:51
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- Structures and Functions in Living Organisms
- Characterisitics
- Movement
- Respiration
- Sensitivity
- Growth
- Reprduction
- Excretion
- Nutrition
- Control
- Levels of Organisation
- Cells
- animal cells
- nucleus, cytoplasm, cell membrane,mitochondria
- plant cells
- vacuole, cell wall, chloroplasts
- animal cells
- Tissues
- Organs
- Organ Systems
- Cells
- Plants, Animals and Fungi
- Bacteria, Protoctists and Viruses
- Enzymes
- are biological catalysts
- Optimum temp is 37 degrees
- higher temp. denatures them
- Very specific
- Substrate
- active site
- Diffusion
- net movement of particles from an area oh higher concentration to a lower concentration
- diffuse through membranes
- Osmosis
- net movement of water molecules from high conc. to lower. conc. through 'partially permeable membrane'
- happens in cells
- Active Transport
- basically diffusion but goes from low to high
- factors affecting movement
- large SA:Vol
- high Temp.
- big difference in Concentration Gradient
- Characterisitics
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