Unit 2: The Cell

Cell membrane
- Made up of phospholipids and proteins
- Phosphate group- love water
- Lipid group hate water
- Proteins attached to bilayer
- Located in cell wall
- Functions:
- Retains cell content
- Controls what enters and leaves (selectively permeable)
Mitochondria
- Supply energy to cell (ATP)
- Site for respiration (aerobic/anaerobic)
- Get from only mother
- Inactive:
- Very few infolding and low amount of energy released
- Active:
- More infoldings, more energy produced
- exercixe causes foldings to increase
Found in muscle and liver, not many in fat tissue
Nucleus
- Control centre of cell
- Double membrane w many nuclear pores, allow certain molecules to enter and exit
- Contains DNA
Nucleolus
- Ribosomes made here
- Part of nucleus that stains darkly
Cytoplasm

Jelly like substance surrounding nucleus
Vacuole

Contains cell sap- fluid containing salts amd sugars
Chloroplasts
- Green structure where photosynthesis takes place
- Contains chlorophyll
Ribosomes
- Consist of protein and RNA
- Makes proteins and combine amino acids to form different proteins
Cell walls
- Made of cellulose
- Support and strengthen the cell
- Fully permeable
Prokaryotic cell

No nucleus or membrane enclosed organelles
Eukaryotic cells

Have nucleus and membrane enclosed organelles

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Leila.navarro

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Unit 2: The Cell

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Unit 2: The Cell

Updated

2018-10-01T22:59:01Z