HAPPY MONDAY. Bellwork: 1 HAPPY MONDAY! Bellwork: 1. Turn in PAGE 36 (Osmosis Worksheet) and PAGE 33 (Egg Lab) 2. Briefly sketch this experimental set-up. 3. In 34 words, explain why this phenomenon happens.

Unit 2 – Cells/Molecule Transport Definitions Due Friday (10/2/15) All Parts Due Tuesday (10/6/15) Chloroplast Mitochondria Nucleus Hypotonic Endoplasmic Reticulum Prokaryote Isotonic Ribosomes Eukaryote Hypertonic Golgi Bodies Endosymbiotic Theory Osmosis Lysosome Cell Membrane Concentration Cytoplasm Permeable Diffusion Impermeable Active Transport Semi-Permeable Facilitated Diffusion Organelle Equilibrium

Egg Lab Quiz

In what other manner do materials move across a cell membrane? Essential Question In what other manner do materials move across a cell membrane? Standard B.4B – Investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis of new molecules PG 34

Recap: Osmosis and diffusion do not use energy.

The function of protein channels in the cell membrane is to make it easy for certain molecules to cross the membrane. This process is known as facilitated diffusion. (help!)

Facilitated diffusion does not require energy Facilitated diffusion does not require energy. Particles still move from an area of high concentration to an area of low concentration.

Concentration Gradient Facilitated Diffusion High No Energy Concentration Gradient Low

Sometimes cells move materials against a concentration difference Sometimes cells move materials against a concentration difference. This process is known as active transport.

This process requires energy This process requires energy. Active transport is carried out by transport proteins found in the membrane.

NEEDS ENERGY and PROTEIN Concentration Gradient Active Transport High NEEDS ENERGY and PROTEIN Concentration Gradient Low

Endocytosis is the process of taking large amounts of material into the cell by means of enfoldings of the cell membrane.

Exocytosis forces contents out of a cell when a vacuole fuses with the cell membrane.

HW: Osmosis Practice Problems PG 37 HW: Osmosis Practice Problems

Molecule Transport Foldable PG 35 Molecule Transport Foldable Step 1 – Color (Lipid Heads– Green, Lipid Tails – Blue, Proteins- Purple) Step 2 - With the Cell Membrane facing up, fold your paper in half (Hot Dog Style) Step 3 - Cut 3 slits on the segments ONLY on the half of the paper facing you. Step 4 - On the half facing up – Separate into 4 Segments and write the Diffusion, Osmosis, Facilitated Diffusion and Active Transport (in that order) – Create concrete spellings.

Direction of particles Diffusion, Osmosis, Facilitated Diffusion, Active Transport Does it use energy? What’s moving? Water OR Solutes Is it moving from High to Low OR Low to High? Does it move through the Phospholipid Bilayer OR Protein Channel? Direction of particles ENERGY SUGAR WATER