Animal Cell Structure
- Created by: Rachael Ayre
- Created on: 29-03-15 20:19
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- Animal Cell Structure
- Plasma Membrane
- Membrane found on surface of animal cell. Mainly made of lipids and protein.
- Regulates movement of substances into/out.
- Receptor molecules, respond to chemicals e.g. hormones.
- Nucleus
- Large Organelle
- Surrounded by nuclear envelope containing many pores
- Pores allow substances (RNA) move between nucleus and cytoplasm
- Contains chromatin and often a nucleolus
- Chromatin made from proteins and DNA
- Nucleolus makes ribosomes
- Lysosome
- Round organelle, surrounded by membrane
- Membrane keeps enzymes separate from cytoplasm
- No clear internal structure
- Contains digestive enzymes, used to digest invading cells/break down worn out components.
- Round organelle, surrounded by membrane
- Ribosome
- Very small organelle
- Floats free in cytoplasm or attached to RER
- Site of protein synthesis
- Endoplasmic Reticulum
- 2 types:
- Smooth ER
- Synthesises and processes lipids
- Rough ER
- Folds and processes proteins made at the ribosomes
- Smooth ER
- System of membranes enclosing fluid-filled space
- RER covered in ribosomes, SER not.
- 2 types:
- Golgi Apparatus
- Group of fluid-filled flattened sacs
- Processes and packages new lipids and proteins
- Makes lysosomes
- Microvilli
- Folds in the plasma membrane
- Increase surface area for more efficient absorption
- Mitochondrian
- Usually oval shaped
- Double membrane, inner is folded forming cristae
- Inside is the matrix
- Contains enzymes involved in respiration
- Site of aerobic respiration
- Reflect the activeness of the cell - more active = more present
- Plasma Membrane
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