Download Cell Transport - Northwest ISD Moodle

What goes in?
What goes out?
 Membrane
• A thin layer-like structure that separates two
fluids.
• Allows some particles/chemicals to pass
through, but not others.


Made of:
• lipids
 Phospholipids
 Cholesterol
• Proteins
 Channels
• Carbohydrates
 Signals
Cell membrane semi-permeable, meaning certaing
things can go in and out.
 Phospholipids
 Cholesterol
• Allows flexibility to the cell membrane
Phospholipids
Cholesterol
 Protein
Channels
• Allow particles to go in and out of the cell
• REQUIRE ENERGY (most of the time)
A
membrane that will allow certain molecules to
pass through it by diffusion.

Passive Transport
• Does NOT require energy to move material in and out the
cell
 Diffusion
 Osmosis
 Facilitated Diffusion (Requires Protein Channel)

Active Transport (Requires Protein Channel)
• Requires energy (ATP) to move materials in and out the
cell
 Antiport
 Symporter
 Uniporter
 Particles
(which are constantly moving) move from
areas of high concentration to low concentration.
 Eventually
 Diffusion
the particles spread evenly.
does NOT require energy.
 Diffusion
of WATER through a selectively
permeable membrane.
 When
the particles are too big to fit through the
membrane, WATER moves from high to low.
 Solution
• A mixture of 1 or more solutes in one solvent.
 Solvent
• Substance in which a solute dissolve
 Solute
• Substance that dissolves to form a solution
Solute
Solvent
 Isotonic
• The concentrations inside and outside the cell
are balance.
 Hypotonic
• Greater concentration of solutes/particles
outside the cell than inside the cell
 Hypertonic
• Lower concentration of solutes/particles outside
the cell than inside the cell.
 Antiport
• Protein channel two ions or solutes are pumped in
opposite direction across a membrane.
 Symport
• Protein channel that allows two or more
ions/molecules to move across the membrane in the
same direction