Add: Frequent Checkpoints Find good videos For reaching equilibrium (so students understand thats when transport stops) to have students compare and contrast energy levels of things moving up and down to activate prior knowledge before stating lesson Tucks driving up a hill vs. sliding down..? Is there a good way to Demo the types of tranports? Make the ATP can to use as a demo Glow sticks? Stop and proactive active vs. passive transport before moving onto HOW is affects the cell One day to do this and make foldable Practice problems/RWA/Demos.? 9/29 Warm-up: Write the question and answer. Date your warm-up 9/29 1.What is the function of the cell membrane? 2.The cell membrane is made up of two organic molecules. What are they? Cellular Transport How is the cell membrane like a cell phone password? When the music starts, talk with partner about how the cell membrane is like a cell phone password. Come up with at least one way. When the music stops be ready to share with the class. Bubble Lab Materials we will use Bubble solution Model Cell Membrane Rubber bands Paper clips Straws Starch Diffusion Lab Purpose: We will observe how molecules move from a high concentration to a low concentration, through a membrane. Hypothesis: IF a bag with starch and water is placed in a beaker of Iodine, THEN_________________________________ _____________________________________ _ because______________________________. Data and Analysis BEFOREAFTER 1.Describe what happened. 2.Discuss diffusion and where in this experiment it occurred. 3.What part of the cell is responsible for maintaining homeostasis? What material in this lab acted like this cell part? Data and Analysis BEFOREAFTER 1.Describe what happened. 2.Discuss diffusion and where in this experiment it occurred. 3.What part of the cell is responsible for maintaining homeostasis? What material in this lab acted like this cell part? Video Inquiry 1.Describe what you saw in the video clip. 2. Which took more energy: the truck going up the hill or down the hill? What is Homeostasis? Maintaining a constant internal BALANCE. Plants and animals regulate things like: pH, water, temperature, glucose, salts, etc. CELL MEMBRANE controls what goes in and out = maintains homeostasis! What is the PHOSPHOLIPID BILAYER? The CELL MEMBRANE! Phospholipidbilayer: two layers ofLIPIDS that make a flexible barrier ALSO: PROTEINS help let things in an out CARBOHYDRATES help identify particles Selectively-permeable: only lets some things move through What does Semi-Permeable Mean? Lets some things in, but not others. SEMI part; selective PERMEABLE things can get in and out How does the cell membrane help maintain homeostasis? 1.The PORES let very SMALL molecules to move in and out freely (O 2, CO 2 & H 2 O) 1.The PROTEINS allowBIGmolecules to get in and out of the cell (Salt & Sugar) The PhospholipidBilayer Phosphate Heads: HYDROPHILLIC = water-loving (stay on the outside of the membrane) Fatty Acid Tails: HYDROPHOBIC= water-fearing (stay on the inside of the membrane) Other Molecules In the Bilayer Check Point 1 1.What is homeostasis? 2.How do your cells help maintain homeostasis? 3.What molecules make up the Cell Membrane? 4.What are 2 ways molecules move through the cell membrane? What is Transport? The cell membrane controls what moves in and what moves out of a cell. This action of moving in and moving out is called TRANSPORT. What are the 2 main types of transport? PASSIVE TRANSPORT Does NOT require energy from the cell (NO ATP) ACTIVE TRANSPORT DOES require energy from the cell (NEEDS ATP) What are the 3 types of Passive Transport? DIFFUSION movement ofPARTICLES OSMOSIS movement of WATER FACILITATED DIFFUSION uses aPROTEIN to help movePARTICLES Check Point 2 1.What type of transport requires no energy and include diffusion and osmosis? 1.What term is used to describe the diffusion of WATER across a membrane? 1.What term is used to describe the movement of particles across a membrane? 1.What term is used to describe the movement of particles across a membrane with the help of a protein, but without using energy? How are they all related..? Transport Active TransportPassive Transport Diffusion Osmosis Facilitated Diffusion What is ACTIVE TRANSPORT? A cell needs ENERGY to move particle across the membrane. Particles are moving from an area of LOW concentration to an area of HIGH concentration Thats why the cell NEEDS ENERGY (going AGAINST the concentration gradient) What is PASSIVE TRANSPORT? Particles are moving from an area of HIGH concentration to an area of LOW concentration. Warm-up: Write the questions and answers on your warm-up sheet for this week. Date your warm-up 10/1/15 1.What are the two types of transport? 2.How are passive and active transport different? 3.What is the difference between diffusion and osmosis? Announcements Dont Forget Signed Progress Reports are due tomorrow Unit 4 Quiz 1 on tomorrow (10/2/15) Tomorrow you will present your Cell Analogy Group Projects Today We Will Warm-up Finish Passive Transport Table or Work on Independent Practice- Cell Boundaries Reading Guide Cell Transport Demonstrations: Food Coloring, Iodine and Starch, Begin Egg Osmosis Finish Guided Notes Independent Practice: Cell Boundaries Reading Guide Exit Ticket Finish Passive Transport Table from yesterday. Work quickly and quietly. Types of Passive Transport SummaryExample (s) What type of particles does it move? Does it require energy? How does it move across the concentration gradient? Use your phone or the biology books to look up examples. Cell Boundaries Reading Guide Use your book, Chapter 7 Section 3 to look up the answers to the reading guide questions. Do NOT write on the reading guide. Use your own sheet of notebook paper. Make sure that you number your answers. Write your answers in complete thought sentences. DIFFUSION Particles move from a HIGH to LOW concentration They move WITH the concentration gradient Cell Transport Demo 1: Starch and Iodine Diffusion Simulation: /student_view0/chapter2/animation__ how_diffusion_works.html /student_view0/chapter2/animation__ how_diffusion_works.html Diffusion Demo 1: Food Coloring Diffusion Demo 2: Starch and Iodine Lab Diffusion Demo 3: Egg Osmosis Diffusion Demo 1: Food coloring Predict what will happen to the food coloring when I put one drop of the food coloring in the water without stirring it? Diffusion demo 2: Starch Diffusion Lab Purpose: We will observe how molecules move from a high concentration to a low concentration, through a membrane. Iodine is an indicator for starch: https://www.youtube.com/watch?v=CWVQWcbts mA https://www.youtube.com/watch?v=CWVQWcbts mA Starch diffusion lab: https://www.youtube.com/watch?v=uFV5co3OM dU https://www.youtube.com/watch?v=uFV5co3OM dU High Concentration to Low Concentration Many MoleculesFewer Molecules Whats In the Bag??? Which has the highest concentration of starch (the bag or the beaker)? Which has the highest concentration of iodine (the bag or the beaker)? Make Some Predictions Write down what you think will happen. Will the starch diffuse out of the bag or will the iodine diffuse into the bag? Use an if, then statement. Hypothesis: IF a bag with iodine is placed in a beaker of starch solution, THEN________________________________________ _______________________________ because______________________________. You may also draw a picture to show what you predict. Data Table: Starting ColorColor after 15 minutes Solution in Beaker Solution in bag Data and Analysis BEFOREAFTER 1.Describe what happened. 2.Discuss diffusion and where in this experiment it occurred. 3.What part of the cell is responsible for maintaining homeostasis? What material in this lab acted like this cell part? Post Lab analysis questions : Answer in complete thought sentences. 1. Based on your observations, which substance moved, the iodine or the starch? 2. How did you determine this? 3. The plastic baggie is permeable to which substance? 4. Is the plastic baggie selectively permeable? 5. Sketch the cup and baggie in the space below. Use arrows to illustrate how diffusion occurred in this lab. FACILITATED DIFFUSION Particles move from a HIGH to LOW concentration with the HELP of a PROTEIN. They move WITH the concentration gradient Facilitated Diffusion Simulation https://www.youtube.com/watch?v=vKGN_Zh z8AY https://www.youtube.com/watch?v=vKGN_Zh z8AY OSMOSIS WATER move from a HIGH to LOW concentration. They move WITH the concentration gradient Osmosis Simulation https://www.youtube.com/watch?v=w3_8FSr qc-I https://www.youtube.com/watch?v=w3_8FSr qc-I When does Passive Transport Stop? Passive transport will continue until EQUILIBRIUM is reached. In other words, when there is the same number of molecules on both sides Check Point 3 1.What is a concentration gradient? 2.What is Active Transport? 3.Which direction does Active Transport move? 4.What is Passive Transport? 5.What direction does Passive Transport move? 6.What is Equilibrium? HOW DOES THIS AFFECT THE CELL? Water is LEAVING cell Cell will SHRINK No net movement EQUILIBRIUM Water is ENTERING cell Cell will SWELL or BURST This happens because the cell wants to balance out, if the particles cannot move the Water must move to balance the concentration inside and outside of the cell. REMEMBER: the water always moves from a HIGH to LOW concentration. 48 Cell will SHRINK CELL 15% NaCL 85% H 2 O 5% NaCL 95% H 2 O What is the direction of water movement? ENVIRONMENT copyright cmassengale 49 Cell at EQUILIBRIUM CELL 10% NaCL 90% H 2 O 10% NaCL 90% H 2 O What is the direction of water movement? The cell is at _______________. equilibrium ENVIRONMENT NO NET MOVEMENT copyright cmassengale 50 Cell will SWELL or BURST CELL 10% NaCL 90% H 2 O 20% NaCL 80% H 2 O What is the direction of water movement? copyright cmassengale 51 Osmosis in Red Blood Cells Isotonic Hypotonic Hypertonic copyright cmassengale Egg Osmosis Pre-lab 1.What do you think would happen to a shell- less egg if water passed into the egg through the membrane? 2. What do you think would happen to a shell- less egg if water passed out of the egg through the membrane? https://www.youtube.com/watch?v=SSS3EtKA zYc https://www.youtube.com/watch?v=SSS3EtKA zYc 53 Three Forms of Transport Across the Membrane copyright cmassengale Cell Boundaries Reading Guide Use your book, Chapter 7 Section 3 to look up the answers to the reading guide questions. Do NOT write on the reading guide. Use your own sheet of notebook paper. Make sure that you number your answers. Write your answers in complete thought sentences. What will move? Water can move. Starch cannot. What will move? Water can move. Salt cannot. What will move? Carbon Dioxide Gas can move. What will move? Salts are being moved using Active Transport! ATP PROTEIN Exit Ticket 1. Which of the following correctly describes diffusion? a.It uses a protein and ATP energy b.It uses a protein to move from a high to low concentration c.It moves water from high to low d.It moves particles from high to low concentration Warm-up: Write the Statement and complete the warm-up on your warm- up sheet for the week. Date your warm-up 10/2/15. I am collecting all of your warm-ups today. Draw two cells. In one, show an example of DIFFUSION and in the other show and example of OSMOSIS! Announcements Today I will give out Unit 2 Qualifiers You will have your Test on Wednesday of next week Remember your Unit 2 Qualifier is due on the day of the Test Today we will Warm-up Review Unit 4 Quiz 1 Unit 2 Item Analysis Cell Analogy Group Presentations Lets Review Yesterdays Exit Ticket Starch Diffusion lab Video and Recap Unit 4 Quiz 1 Work Independently and silently. Dont forget the rules for taking quizzes and tests. Cheating= automatic zero and conference Once you have finished with your quiz, work on the Unit 4 Qualifier Unit 2 Item Analysis Complete Unit 2 item analysis independently and silently. If you are talking or receiving help from other students you will not receive credit for test corrections. Cell Analogy Group Projects