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Why is magnification limited in light microscopes
because light, like all forms of radiation, diffracts (bends) or scatters as it passes through matter and this limits the microscope’s resolution
resolution
the ability to distinguish between two objects that are next to one another
cell theory
all living things are made up of cells
cell theory
cells are the basic unit of structure and function in all living things
cell theory
new cells are produced from existing cells
cell walls
Supports, shapes, and protects the cell
cell walls
is found external to the cell membrane
cell walls
plant cells have cell walls
organelles
structures within a cell that act like specialized organs
chromatin
long, thin strands of DNA and protein
chromatin
exists in the form when the cell is !!!!NOT!!!! dividing
chromosomes
coiled, rod-shaped packages of DNA and protein
chromosomes
exists in this form when the cell !!is!! dividing
diffusion
the movement of molecules from an area of high concentration to an area of low concentration
diffusion
diffusion always occurs “down the concentration gradient”
diffusion
occurs because of the kinetic energy of the particles themselves
diffusion
occurs when the equilibrium is established
concentration gradient
the difference between the concentration of a particular molecule in one area vs. its concentration in another area
facilitated diffusion
the diffusion of particles across a cell membrane vis special protein channels
osmosis
the diffusion of water through a selectively permeable membrane via aquaporins
levels of organization (from simplest to most complex)
cell—tissue—organ—organ system—organism
Note
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