Facilitated Diffusion Left Page 23 One Pager Happy Tuesday Bio-ninjas! Please READ ALL sections below! Journals: Table of Contents: Right Page 24 Facilitated Diffusion Left Page 23 One Pager Set up page 24 for Cornell Notes with Title and EQ EQ: How is facilitated diffusion different or the same as osmosis or regular diffusion? Due today: Homework: Worksheet(s) Annotated notes: Diffusion/Osmosis One Day Late: (70) Nothing… Two days Late: (50) Annotated Notes (Organelles) Colored Pro/Eu Cell Diagrams Cell City Analogy Worksheet Three Days Late: (0) Annotated Cornell Notes (Eukayotes) Note Cards-word/definition/picture and color for words we’ve covered so far. Prokaryotic vs Eukaryotic Y-Chart Creative thinking exercise HAVE LATE WORK/EXTRA CREDIT OUT READY TO BE CHECKED!

How do molecules move across the cell membrane? JOURNALS: Table of Contents: Right Page 23 Egg Lab Left Page 22 Osmosis Homework 2 Set up page 23 Egg lab EQ: How do molecules move across a membrane? Egg Lab Essential Question: Question Column Egg in Vinegar Egg in Syrup Egg in Water L1 – L2 – L3 – Prediction: Hypothesis: Observation: Diagram: Summary - How do molecules move across the cell membrane?

Discuss with your partner: What is happening in the picture? You must use the words: Lipid Bilayer, Concentration, High, Low, Diffusion/Osmosis, Particles/Water, Equilibrium .

Homework check!

Standard B4.B: investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis of new molecules.

Concentration Gradient

The lipid bilayer allows most small molecules to diffuse in and out but not large or charged molecules.

So, if the cell needs these larger or charged molecules to function, how are they able to get through the membrane?

The Cell Membrane: It’s not just Lipids, Ya’ll The Cell Membrane: It’s not just Lipids, Ya’ll. It surrounds the entire cell and also contains special protein and carbohydrate compounds.

The Cell Membrane: Proteins perform some very special functions for the cell.

Proteins form special pathways or channels for larger particles

Facilitate: to make easier or to assist Diffuse: when molecules move from high to low concentration or with the concentration gradient High Low

Facilitated Diffusion: molecules diffuse across a membrane with the help of transport proteins.

Facilitated Diffusion

Diffusion and Facilitated Diffusion both go with the concentration gradient. (high to low)

Moving WITH the concentration gradient (high to low) requires no energy. *Diffusion, Osmosis and Facilitated Diffusion “Go with the flow”

However...sometimes molecules need to move AGAINST the concentration gradient (Low to High)

Moving from Low to High concentration DOES require energy… *Going against the flow

Active Transport:. Larger molecules move through a protein channel Active Transport: *Larger molecules move through a protein channel *Low to higher concentration *Requires energy.

ATP: Adenosine Triphosphate Molecule that provides energy for Active Transport

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.

Answer the following questions: What is happening to the Hydrogen in the picture? What process is happening in the top part of the picture? How do you know? What process is happening in the bottom part of the picture? How do you know?

Set up foldable Homework: One Pager (left side) Compare/Contrast Diffusion, Osmosis, and Facilitated Diffusion. Must include at least five different colors At least one picture for each process.