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Studying the Structure of Cells

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Studying the Structure of Cells
1.1 Studying the Structure of Cells

In 1665, English scientist Robert Hooke became the first person to study cells

Cell Structure

Nucleolus: Makes Ribosomes, which help to make proteins

Nuclear Membrane: Protects the contents of the nucleus

Nuclear Pores: Allow materials, such as ribosomes, in and out of the nucleus

|Light Microscope |Electron Microscope | |Uses light source |Beams of electrons focused by magnetic lenses| |Enable view to watch living cells |Produces an image of the shadows cast by | | |atoms of heavy metals; the living tissue is | | |destroyed by the intense beam of electrons | |Electron microscope has about 10,000 times the resolving power of the light instrument, and | |can therefore show far greater detail |

Cell Theory (made in the mid-1880s)

All living cells are made of one or more cells

The cell is the basic organizational unit of life
(all organism body functions are designed to supply the needs of its cell)

All cells come from pre-existing cells
(cell reproduction)

Cytosol: Fluid material between the cell membrane and the nucleus, filled w/ many specialized organelles

Animal & Plant Cell Organelles

All cells in your body depend on proteins

A number of the organelles are involved in the production, storage, or transport of proteins

Proteins are essential nutrients for the growth and repair of body tissues

All Cells Use Energy

Cellular Respiration: The process by which mitochondria releases energy from glucose

Cellular Respiration uses oxygen in order to occur
(we breath in air - containing oxygen)

Cellular Respiration produces carbon dioxide as a waste product when it releases energy (we get rid of Carbon Dioxide & water
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