Guided Reading questions Pages 90-96

 With table partner check over your Cell S & F worksheet  Fill in any blanks  Return to your lab group’s cell poster  Is your scenario clear?  Poster Walk complete?  You will be assigned another scenario … Use large white board to illustrate what would happen in your cell?

 Give an example of each  What are the advantages of each?

 P 96 #1-2 - we will correct #1 together  #2 - You may answer this alone or in pairs using a white board

Prokaryotic Eukaryotic  Early cell  Analogy– Studio apartment: limited space or compartments for cellular functions  Example: ____________  Missing structure: Plasma Membrane organelles especially the NUCLEUS  Later developed cell  Analogy – Mansion: Many rooms or compartments for cellular functions  Example: ____________  Structures common with Prokaryotic Cell: [p.96#1] ◦ ________________

 Cellular Respiration occurs in all cells  Use your white board to explain how it occurs in one type of cell! [May work in pairs or alone] ◦ Be sure to include:  Type of Cell?  What organelles are involved?  Where and what happens? ◦ What is the main difference between Prokaryotic vs. Eukaryotic Cells?

 Division of labor (less work for each part)  Complex processes are able to occur  In a multicellular organism, the organelles may have a different distribution of structures to get the job done ◦ Example muscle cell vs. a skin cell in humans  Metabolic processes such as Photosynthesis and Cellular Respiration occur in special compartments such as

 Processes such as Cellular Respiration takes a longer amount of time & more molecules needed to complete the process  Reproduction of Chromosomes more complex and take longer  Cell Division is more complex & time consuming  More structures to produce and maintain

 What are some metabolic processes that occur in Plant Cell, Animal Cell, Bacteria Cell?  Where do these processes occur in eukaryotes?  In prokaryotes?  Let’s go through a process together…

 Name the process  What biomolecules are needed for this process  What organelles are used in process  Note the order of the organelles being used  Note what each organelle does in this process  Don’t forget about what happens to the product

 What happens in each example ◦ Tea bag in warm – What happens? ◦ Perfume (gas in gas) ◦ Food coloring (liquid in liquid) ◦ Potassium Permanganate (solid in liquid)  Diffusion is the movement of molecules from an area of __________ concentration to an area _________concentration of a substance until equilibrium has been reached. [Down the Concentration Gradient]

 What is the organelle that serves as a boundary?  What role must the boundary organelle play?  How does the cell both protect itself from hazards in its environment and allow resources from the environment into the cell in order to carry out its life sustaining functions?

 Each pair of students (model partner) will answer assigned questions together [a-i]  Be sure you have answered your assigned question(s) on your worksheet  Be prepared to report your question(s)’ answers to the full class - Please the white board (front of class) or doc camera for any drawings necessary  You have limited time, so work quickly!  All will be responsible for all answers.

Build-the-Membrane …model  Get your model to use as we go through the information on the membrane’s function! integral protein  How many proteins on your model are known as an integral protein? _____ Name & list!  Which protein was a peripheral protein? (did not go through the lipid layer of membrane)  Proteins that transmit signals across a membrane are called________________  Transporter Channel Proteins  Transporter & Channel Proteins form pores that open & close to allow specific molecules through the membrane.

 1/21 (Thursday)  Inquiry activity  Lab activity with starch and baggie  What represented the following? ◦ Cell Membrane ____________ ◦ Cytoplasm and large molecules in cell __________ ◦ External environment – molecules ____________  You should have the color of the solution in the bag and the beaker recorded  You should also have a prediction recorded  Note before pulling beaker out of drawer

 Observe your lab group’s set up  Record: ◦ Color of Baggie solution  Note without disturbing the bag in beaker  Then slowly remove bag from beaker  Record color and not any other changes in baggie’s solution ◦ Color of solution in the beaker  Note any additional changes to the beaker solution  Clean up ◦ Baggie may be placed in garbage ◦ Beaker rinsed out with water; dried

 Answer all analysis questions on worksheet  Discuss with your lab group ◦ Was there a change? ◦ What moved through the baggie? ◦ How do you know? ◦ Was this an example of selective permeability?

 Separates the internal metabolic action from the disordered and sometimes harsh external environment while permitting certain substances in selectively  Called “ Selectively Permeability”

 Take in resources it needs for metabolic processes such as ____________________  Be able to rid itself of wastes such as _________________________  Be able to keep harmful substances out of the cell such as ________________________

 Movement of molecules from an area of high concentration to an area of low concentration.  Note DEMO ◦ Perfume… (gas in gas) ◦ Beaker with dye drops (liquid in a liquid) ◦ Beaker with powder dye (solid in a liquid) ◦ Teabag in water  Hot water  Cold water  What about through a cell membrane? ◦ Which demo models a membrane? ◦ What models it in the labs you’ve done?

Molecules of dye Membrane (cross section) WATER (a) Diffusion of one solute Net diffusion Equilibrium

 Let’s correct the worksheet  You are responsible for knowing the make up of the cell membrane!  Note the following slides and coloring you completed…

Hydrophilic head Hydrophobic tail WATER

Do you have a drawing of this molecule? Note the Hydrophilic and hydrophobic portions…

Phospholipid bilayer Hydrophobic regions of protein Hydrophilic regions of protein Hydrophobic vs. Hydrophilic

 What biomolecules compose the cell membrane?  What properties are important for this boundary to have? Why?  How do think substances move in and out of the cell across this boundary?

 How do lipid-soluble molecules move through the membrane?  What moves through membrane without use of Protein?  What happens to the passage of gases? ◦ Oxygen ◦ Carbon Dioxide  How does water move through the membrane?  Which substances need a protein to move cross the membrane?

 No energy from the cell is needed for movement of materials through membrane [Movement with the concentration gradient]  Diffusion  Diffusion : Movement of molecules from a high concentration to a low concentration.  Facilitated Diffusion:  Facilitated Diffusion: Diffusion of LARGE molecules using Channel Protein  Osmosis  Osmosis : Diffusion of water through a semi-permeable membrane ◦ NOTE THESE DEFINITIONS

Example of this would be?

More wateroutside Water same in & out More water inside

 When does a cell use Facilitated Diffusion? ◦ Examples: ____________________________________  What must be present in the membrane for it to occur? _____________ __________  Do the molecules still move from a HIGH concentration to a LOW concentration? _____

Energy  Uses cell Energy to move particles through the membrane  Moving particles from a low concentration to a high concentration…. Going against the physical law of diffusion. [or concentration gradient]  Membrane proteins are used in active transport ◦ NOTE THIS INFORMATION

Active transport ATP

Passive transportActive transport DiffusionFacilitated diffusion ATP OSMOSIS – movement of water NO ENERGY NEEDED

Answer the following in Notebook:  Did the Cell Membrane illustrate Passive Transport, Active Transport OR Both?  Which molecules moved through the plastic ziploc bag?  How do you know?  List the molecules used in this activity from the smallest to the largest?  Complete any other questions not answered in notebook

 Let’s look at more cells ◦ Plant Cell (Elodea – water plant)  Add %15 Salt (NaCl) solution  View what happens to the plant cell ◦ Protists (unicellular organism – Amoeba) – prepared slide ◦ Bacteria (prokaryotic cell) – prepared slide ◦ Revisit Cheek cells  Add %15 Salt (NaCl) solution  What happens to the cheek cells

 What occurs when iodine is added to a starch solution? ________________________  In lab groups, set up the simulation…  Make a prediction as to what you think will move through the bag (cell membrane model)  Label cup… final reading will occur on ______?