Download Review Chapter 5

Review CH: 5
Explain the types of passive
transport.
Diffusion: movement of molecules
from an area of higher conc. to an
area of lower concentration Example:
Food coloring added to water (S.A)
Osmosis: movement of water from
an area of higher concentration to an
area of lower concentration (S.A)
Facilitated Diffusion: movement of
molecules from an area of higher
concentration to an area of lower
concentration by using carrier
proteins
Ion Channels: movement of ions
across the cell membrane through
small passageways
Explain the types of active
transport.
Sodium-Potassium pump:
movement of ions from an area of
lower concentration to an area of
higher concentration by the use of
energy ( 3 Na+ are pumped outside
and 2 K+ are pumped inside)
Endocytosis: process by which cells
ingest large particles or other cells
Examples: pinocytosis-drinking and
phagocytosis-eating (S.A)
Exocytosis: process by which
particles are expelled or removed
from the cell (S.A)
Determine what type of solution a
cell was placed in. Draw picture
Isotonic:
 concentration of solutes is equal
inside and outside of the cell
 water moves back and forward at
the same rate
 cell does not change
Hypotonic:
 concentration of solute outside the
cell is lower
 concentration of water outside the
cell is higher
 water moves into the cell
 cell swells
Hypertonic:
 concentration of solute outside the
cell is higher
 concentration of water outside the
cell is lower
 water moves out of the cell
 cell shrinks
Define
Concentration gradient: difference in
the concentration of molecules across
a space
Equilibrium: condition in which the
concentration of molecules of a
substance is the same throughout a
space
Contractile vacuole: collects excess
water and pump it out
Turgor pressure: pressure that water
molecules exert against the cell wall
Carrier protein: protein in cell
membrane that moves molecules
across the membrane
Factors why a molecule may not pass
through a cell membrane
 Size
 Soluble in the cell membrane
 Charged (ion-Na+, Cl -)
Matching
Equilibrium
Contractile vacuole
Concentration gradient
Turgor pressure
Carrier protein
Hypertonic
Hypotonic
Isotonic