BELL RINGER
1. Unlike DNA, RNA contains
2. The bonds linking the phosphate
groups and sugars in our genetic code
are
3. What combines with sugar and a
phosphate group from a nucleotide?
4. What is the duty of tRNA?
Agenda:
-Bell Ringer
-Setup Diffusion Lab
-Cell Transport Notes
-Complete Diffusion
Lab
-Cell Transport
Worksheet
BELL RINGER
TEST NEXT
Tuesday!!
1. In what part of the cell does
translation occur in?
2. Name the enzyme that digests
the sugar found in milk.
3. What characteristic allows
enzymes to function in a
specific way?
Agenda:
-Bell Ringer
-Cell Transport Flow(Tree)
Diagram
-Cell Transport Worksheet
State Standard:
B-2.5 Explain how active,
passive, and facilitated
transport, serve to
maintain the homeostasis
of the cell.
SC State Standards
-The movement of
solutes and solvents
(water) into and out of
cells is essential for the
survival of the
organism.
• Homeostasis= necessity of all
organisms to maintain constant or
stable conditions
• This depends on the amount of
materials moving in and out of cell
• Waste materials exiting from
cellular processes
• Oxygen and glucose needed for
cellular respiration
• Each cell exists in a fluid environment and the
cytoplasm is also in a fluid state
• This makes it possible for fluids to move in
and out
• Cell membrane is semipermeable (selectively
permeable)
• Some substances can pass through while
others cannot
• Substances pass through either by active or
passive transport
Hydrophilicwater loving
Phosphate
Heads
Hydrophobicwater hating
Fatty Acid Tails
Passive
Transport
Diffusion
Osmosis
Facilitated
Diffusion
Passive Transport
•The movement of
molecules from to
concentration.
•No energy needed.
• If cells are placed in a solution that is
different in concentration from that of
the cell, the cells may be damaged and
even shrivel or burst!
Diffusion
The movement of solutes
from
to
.
• The spreading out of molecules across
a cell membrane until they are equally
concentrated.
Osmosis
The movement of water
molecules from to .
Facilitated Diffusion
The movement of
macromolecules through
protein channels from
to .
• Process by which some substances are
not able to pass directly through a cell
membrane but are able to enter the
cell with the aid of transport proteins
Active
Transport
Air-lock
Protein
Endocytosis Exocytosis
Phagocytosis
Pinocytosis
Active Transport
•The movement of
molecules from an area
of concentration to an
area of concentration.
•Energy is required.
Airlock Proteins
When a carrier protein
uses energy to move
small molecules from
to concentrations.
• Endocystosis and Exocytosis occur
when molecules are too large to pass
through a cell membrane even with
the aid of transport proteins
ExocytosisSubstances leaving
the cell without
passing through the
phospholipid bilayer.
Endocytosis
The movement of
macromolecules into a
cell without passing
through the
phospholipid bilayer.
Phagocytosis- solid
macromolecules moving into a
cell without passing through the
phospholipid bilayer.
Pinocytosis- liquids with
solutes moving into a cell
without passing through the
phospholipid bilayer.
Summary
Diane Goshert
SHS
Diane Goshert
SHS