Cell Biology Part 1: Animal, Plant, and Bacterial Cells
This page provides a comprehensive overview of cell biology, focusing on the structures and functions of animal, plant, and bacterial cells. It also covers specialized cells, microscopy, and magnification.
Animal and Plant Cells
The page begins with detailed diagrams of animal cell GCSE and plant cell GCSE structures, highlighting their key components.
Animal Cell (Eukaryotic)
- Cell membrane: Controls what enters and exits the cell
- Cytoplasm: Site of enzyme-controlled reactions
- Nucleus: Controls all cell activities
- Mitochondria: Energy production through respiration
- Ribosomes: Protein synthesis
Vocabulary: Eukaryotic - A cell type with a nucleus and membrane-bound organelles.
Plant Cell (Eukaryotic)
- Cell wall: Made of cellulose, strengthens the cell
- Cell membrane: Regulates substance movement
- Chloroplasts: Contain chlorophyll for photosynthesis
- Nucleus: Controls cell activities
- Cytoplasm: Contains genetic material
- Permanent vacuole: Supports cell structure
Highlight: Plant cells have additional structures compared to animal cells, such as a cell wall, chloroplasts, and a large permanent vacuole.
Bacterial Cell (Prokaryotic)
The page also includes information on bacterial cell structure:
- Cytoplasm: Contains genetic material
- Ribosomes: For protein synthesis
- Slime capsule: Protects the cell
- Cell wall: Made of cellulose, strengthens the cell
- Flagella: Aids in movement and swimming
- Plasmids: Small rings of DNA
Definition: Prokaryotic cells are simpler cells without a nucleus or membrane-bound organelles, typically found in bacteria.
Microscopy and Magnification
The transcript touches on microscopy techniques:
- Electron microscopes: Provide higher resolution and magnification
- Magnification formula: Image size ÷ Actual size
Example: The page includes a magnification scale, showing the relationship between meters, centimeters, millimeters, micrometers, and nanometers.
Specialized Cells
The page concludes with examples of specialized cells in GCSE cell biology AQA:
- Nerve cells: Carry electrical impulses
- Phloem cells: Transport sugar in plants
- Xylem cells: Transport water and minerals in plants
- Red blood cells: Carry oxygen in the body
- Ciliated epithelial cells: Remove mucus and dust from lungs
- Sperm cells: Fertilize egg cells
- Root hair cells: Absorb water and minerals from soil
- Muscle cells: Contract to move bones
Highlight: Each specialized cell has a unique structure adapted to its specific function in the body or plant.
This comprehensive overview provides essential information for students studying GCSE cell biology animal and plant cells topics, covering cell structures, functions, and specialized adaptations.
