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17 Cards in this Set

  • Front
  • Back
structure of a cell membrane
phospholipid bilayer
proteins
2 types of cellular transport (moving things in and out of the cell)
passive transport (no energy needed)
active transport (atp/required needed)
3 types of passive transport
diffusion
osmosis
facilitated transport/diffusion
characteristics of all forms of passive transport
move substance from high to low
doesn’t require energy(ATP)
solute
any substance that is dissolved in another substance
Concentration Gradient
a difference in the # of particles from 1 area to another
diffusion
involves the movement of small particles from areas of HIGH concentration to area of low concentration

does not require energy


example
Axe spray spreading out across the room in after being sprayed and in a concentrated area
Diffusion occurs until what is reached
equilibrium
Equilllibrium
when particles are equally moving thought the season but are still in motion
Osmosis
the diffusion of water molecules across a e=selectively preamble membrane

doesn’t need atp
occurs from high to low concentration
3 types of osmotic solutions & explain
isotonic - same amount as other solution
hypertonic - has more solutes than another solution
hypotonic - has less solutes than other solution
The more solute the lower the _______ concentration
water
Cells in a hypertonic state will ________
shrivel
cells in a hypotonic solution _____
swell
Active transport
the movement of ions or molecules across the cell membrane regardless or intracellular or extracellular concentrations

requires energy
requires protein channel
The NA+/K+ exchange pump
NA+ is opposite of K+ so needs to be exchange out for each other

for each 3NA+ a K+ is reclaimed
compare passive vs. active
passive:
1. disffusion
H -> L
no atp
no membrane is needed

2.Osmosis
H -> L (water only)
no atop
membrane is needed

3. facilitated diffusion
H -> L
membrane + protiens
no atp
channel needed



Active
atp is needed
L -> H
protein carrier + membrane