Biology unit 2 Cells and simple cell transport

B2.1 Cells and simple cell transport revision cards

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  • Created by: esme
  • Created on: 24-04-13 09:41

Biology unit 2 Cells and simple cell transport

Cells and simple cell transport

Cells: All living things are made up of cells. The structures of different types of cells are related to their functions. Cells may be specialised to carry out a particular job for instance root hair cell, egg cell, sperm cell and palisade cell.

Cell structure: Most human, plant and animal cells have the following parts: 

  • Nucleus - controls the activities of the cell
  • Cytoplasm - most chemical reactions take place here
  • A cell membrane - controls passage of substances in and out of the cell
  • Mitochondria - where most energy is released in repiration 
  • Ribosomes - where protein synthesis occurs 

Plant cells also have a cell wall, chloroplasts and a permanent vacuole. 

Diffusion: Diffusion is the spreading of particles of a gas or a substance in solution. It results in net movement from a region where the particles are of a higher concentration to a region of lower concentraction 

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