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448168
Chapter 7: Cell Structure and Function
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Mind Map on Chapter 7: Cell Structure and Function, created by StudyBuddy on 18/12/2013.
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high school biology
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Resource summary
Chapter 7: Cell Structure and Function
Cells
Surrounded by cell membrane; contain DNA
Prokaryotic
DNA is in cytoplasm
Generally smaller
Unicellular
Includes bacteria
Eukaryotic
DNA is in nucleus
Generally larger
Uni/Multi Cellular
Contain membrane-bound organelles
Includes animals, plants, fungi, and protists
Cell Transport
Cell membrane - regulates what enters and leaves the cell
Lipid Bilayer
Flexible, Strong
Selective permeability - particle can pass through, while others cannot
Passive Transport - no energy required
Diffusion
Molecules in a lipid or gas spread out from high to low concentration
Small molecules diffuse faster
Particles keep moving back and forth after they spread out
Equilibrium is reached
Facilitated Diffusion
Molecules that can't pass the lipid bilayer or diffuse through specific protein channels
Osmosis
Diffusion of water across a selectively permeable membrane
Occurs when solute is not able to cross membrane
Water moves through an aquaporin protein channel, from a high to low concentration of water, until solutions are isotonic
Hypertonic - Solution has a lower concentration of water and higher concentration of solute
Hypotonic - Solution has a lower concentration of solute and a higher concentration of water
Isotonic - solutions are of equal concentrations
Osmotic pressure
Active Transport - particles move from low to high concentration; requires energy
Molecular Transport - requires carriers proteins that use energy to move across the membrane
Bulk Transport - Energy is used to move larger clumps
Endocytosis - large particles enter the cell, through infoldings of the membrane
Pinocytosis - liquid substances enter
Phagocytosis - solid substances enter
Exocytosis - large particle leave the cell, as the package fom the Golgi Apparatus fuses w/cell membrane and is secreted
Microscope
On Slide
M
P
In scope
W
d
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