osmosis enzymes and diffusion Flashcards
primary structure of a protien is held together by
covalent bonds
enzymes..
are biological catalysts and lower the energy of reactions
phospholipids in the cell membrane…
form a double layer membrane with their hydrophobic tails facing each other
fatty acids
are hydrophobic carbon chains
a cell immersed in a hypotonic solution
will grow as water moves into the cell
as a spherical cell grows in size
its diameter increases, its volume increases, its surface area to volume ratio decreases
the rate of diffusion
is dependant on the temperature
passive transport does not require
energy input from the cell
osmosis is the passive movement of
diffusion
what is the difference in the amount of dissolved solute between two places
osmosis
a solution that contains a higher salt/sugar concentration than the cell is called a ______ solution
hypotonic
plant cells have ___ but animals do not
cell membrane
when placed in a hypertonic solution an animal cell will
swell
a solution with lower salt/sugar compared to the cell is called
hypertonic solution
in an isotonic solution the cell would be in _______ because theres would be no net movement of water
plasmolysis
putting a freshwater animal into salt water would cause the cells to ________
shrink because it is a hypertonic solution
water
small, non polar
facilitated by protien cannels - transport
cellular energy not required
K*
small, charged
protien pumps - transport
cellular energy is required
cellular protiens
exocytosis/endocytosis - transport
cellular energy is required
oxygen
small, non polar
simple diffusion - transport
cellular energy not required
