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Cell Biology - Coggle Diagram
Cell Biology
Cell Membranes
Separate the cell organelles and cytoplasm from the outside
Semi permeable
Allows some molecules freely in and out and others to enter with help of intrinsic protein
give support to cell (shape)
Recognise molecules (extrinsic proteins)
The Microscope
Compound Microscopes
Labels
Stage
where the specimen is placed
Course focus
focus for low magnification
Clips
holds the specimen in place
Objective lens
lens immediately above the specimen
Diaphragm
Adjust amount of light through specimen
Eyepiece lens
the lens you look through
Light
light source
Fine focus
focus for high magnification
Compound - uses two lenses for magnification
Magnification
is the magnifying power of both lenses multiplied
TEM microscopes
Transmission Electron Microscope
Uses electrons in place of light
much lower wave length
Resolution + magnification are much greater
Nucleus
Large organelle near centre of cell
Contains cells' genetic info
controls cell activities
Mitochondria
supplies energy to cell (respiration)
more = more energy
inner membranes produce the energy
Ribosomes
Makes proteins
Cytoplasm
clear jelly like fluid
fills the cell (hydro skeleton)
Plant cells
Plant cells have other organelles
Cell walls
Rigid/ gives cell defined shape
composed of; cellulose fibre, polysaccharides and proteins
function= support+strengthen cell
Chloroplasts
function = photosynthesis
Large vacuoles
membrane bound sacs in cytoplasm of cell
provides structural support, storage, waste disposal, protection and growth
plant cells = large vacuoles, Animal cells = small