Sample-Cells/The Cell/Summary

The Cell As A Factory
To make the function of the parts of the cell easier to understand and remember you can compare them to a factory. For example:


 * The nucleus (1) is the managing director of the factory consulting the blueprint (the chromosomes) (2);
 * The mitochondria (3) supply the power
 * The ribosomes (4) make the products;
 * The chloroplasts of plant cells (5) supply the fuel (food)
 * The Golgi apparatus (6) packages the products ready for dispatch;
 * The ER (7) modifies, stores and transports the products around the factory;
 * The plasma membrane is the factory wall and the gates (8);
 * The lysosomes dispose of the waste and worn-out machinery.

The cell compared to a factory

Insert here: TYS 5

Summary

 * Cells consist of three parts: the plasma membrane, cytoplasm and nucleus.
 * Substances pass through the plasma membrane by diffusion (gases, lipids), osmosis (water), active transport (glucose, ions), phagocytosis (particles), pinocytosis (fluids) and exocytosis (particles and fluids).
 * Osmosis is the diffusion of water through a semipermeable membrane. Water diffuses from high water "concentration" to low water "concentration".
 * The cytoplasm consists of cytosol in which are suspended cell inclusions and organelles.
 * organelles include ribosomes, endoplasmic reticulum, mitochondria, Golgi bodies and lysosomes.
 * The nucleus controls the activity of the cell. It contains the chromosomes that are composed of DNA.
 * The cell divides by mitosis and meiosis

Insert here: W/S Cell Qs 6-9

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