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Biology - Chapter 7 - Coggle Diagram
Biology - Chapter 7
Section 4
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dynamic equilibrium is when molecules move, but concentration is the same
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diffusion is the movement of particles from an area of
high concentration to an area of lower concentration
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active transport is the movement of particles across the cell membrane, against the concentration gradient
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endocytosis is process in which a cell surrounds an
object in the outside environment of the plasma membrane
Section 3
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the cytoskeleton is a framework of protein fibers that provde a framework for the cell and is an anchor for organelles
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Section 1
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Microscopes
Electron microscope
The transmission electron microscope uses magnets to aim a beam of electrons at the image to be magnified up to 500,000×. The scanning electron microscope produces a three-dimensional image of the cell. The scanning tunneling electron microscope can magnify living cells.
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Eukaryotic cells have a nucleus (contains genetic material) organelles (specialized structures that carry out specific functions).
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phospholipids are composed of a phosphate head, glycerol backbone, and two fatty acids tails
Plasma membranes have selective permeability which allows some substances to pass through while keeping others out
cholesterol prevents fatty acids from sticking together, keeping the plasma membraine fluid
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