Bell Ringer Unlike DNA, RNA contains The bonds linking the phosphate groups and sugars in our genetic code are What combines with sugar and a phosphate group from a nucleotide? What is the duty of tRNA? Agenda: -Bell Ringer -Setup Diffusion Lab -Cell Transport Notes -Complete Diffusion Lab -Cell Transport Worksheet

Bell RInger In what part of the cell does translation occur in? TEST NEXT Tuesday!! In what part of the cell does translation occur in? Name the enzyme that digests the sugar found in milk. What characteristic allows enzymes to function in a specific way? Agenda: -Bell Ringer -Cell Transport Flow(Tree) Diagram -Cell Transport Worksheet

Cellular Transport

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

Hydrophilic-water loving Phosphate Heads Hydrophilic-water loving Hydrophobic-water hating Fatty Acid Tails

Passive Transport Facilitated Diffusion Diffusion Osmosis

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 .

The movement of macromolecules through protein channels 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 Pinocytosis 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

Exocytosis- Substances 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

The End