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18 Cards in this Set

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  • Back
plasma (cell) membrane
outer barrier separating cell's internal enviro from xternal enviro
cytoplasm
area btween nucleus and cell membrane (jelly-like substance surrounding organelles)
organelles
tiny specialized structures performing specific functions in the cell
functions of cell membrane
~flexible boundary enclosing the cell contents
~contact w/other body cells or substances
~receptors 4 chemicals, enzymes, hormones, nutrients
~allows substances 2 enter and sum 2 not
double the C . . . double the s ---- that's what makes success
size, solubility, charged ions, carrier molecules
passive transport
requires no energy (H 2 L)
diffusion
molecules moving from H 2 L concentration
facilitated diffusion
diffusion w/the help of carrier proteins (like glucose)
osmosis
diffusion of water
~isotonic . . . equal amounts of solute and H20
~hypertonic . . . hi solute/low H20 (hi concentration)
~hypotonic . . . low solute/hi H20 (low concentration)
rbc conditions
hypotonic=hemolysis
~cells swell and burst
hypertonic=crenation
~cells shrink
filtration
pressure (H20) moves molecules through cell membrane
active transport
requires energy (L 2 H)
endocytosis
large molecules, small particules, and liquids pass membrane
phagocytosis
cells engulf large particles
pinocytosis
liquids are engulfed
exocytosis
xport of substances from cell
cytoplasm
~inside cell membrane and outside nucleus
~thick, semitransparent elastic fluid w/suspended particles
~75% to 90% H20 + solid components like carbos, aminos, and peptided
~chemical reactions take place (new subs r synthesized), chemical packaged and transported and allows for the excretion of waste products
nucleus
~contains hereditary info, DNA, genes, chromosomes
~produces nucleic acids DNA and RNA
~separated from cytoplasm by a double nuclear membrane (contains pores/communicates w/cytoplasm)