* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download What kind of transport?
Survey
Document related concepts
Biochemical switches in the cell cycle wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Signal transduction wikipedia , lookup
Extracellular matrix wikipedia , lookup
Programmed cell death wikipedia , lookup
Cell culture wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell growth wikipedia , lookup
Cell membrane wikipedia , lookup
Cytokinesis wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Transcript
Statement of Inquiry: DATE HERE AGENDA 5 min DO NOW: Answer the following question {Insert entrance instructions here} For example: 1. Enter the classroom silently and find your seat. 2. Write down homework in your planner. 3. Do Now 4. Wait silently for instructions Objective(s): • (Obj 1) Summarize the main types of passive transport • (Obj 2) Predict the direction of water movement into and out of cells by passive transport. 10 min Do Now Objectives of the day • (Obj 1) Summarize the main types of passive transport • (Obj 2) Predict the direction of water movement into and out of cells by passive transport. Statement of Inquiry/IB Trait STATEMENT OF INQUIRY: The relationship between the structure and function of our parts is one way that we define what it means to be human. IB TRAIT: KNOWLEDGEABLE, COMMUNICATORS and INQUIRERS Homework Write definitions and either draw or provide examples for: 1. passive transport 2. concentration gradient 3. equilibrium 4. diffusion 5. osmosis 6. hypertonic solution 7. hypotonic solution 8. isotonic solution 9. ion channel 10. carrier protein 11. facilitated diffusion Cell Membrane • Composed of phospholipid bilayer (polar heads, nonpolar tails) and proteins – Integral proteins = embedded within – Peripheral proteins = not embedded within, attached loosely to the surface • Semi-permeable = only allows certain materials in and out of cell 4 min Diffusion in a beaker What are you observing? 1 min Passive Transport: Diffusion • Diffusion is one of the processes you are observing. Diffusion works very quickly over short distances but slowly over long distances. • Most of the mixing in this demonstration is caused by slight air currents across the surface of the water as well as temperature differences within the water. This demonstration, therefore, is more a model of convection than an example of actual diffusion. 8 min Explore through Reading 1. Independently read the text. 2. In your guided notes, summarize your learning in your own words. Use complete sentences. 2 min Explore through Reading 1. Turn to your table partner. 2. Discuss your answers and finalize your responses to the questions. Bring it back together! 1. What is diffusion? 2. What is facilitated diffusion? How does it differ from diffusion? 3. What is osmosis? Compare and contrast diffusion and osmosis. 4. What do diffusion, facilitated diffusion, and osmosis all have in common? Diffusion Movement of particles from an area of high concentration to an area of lower concentration. Requires NO energy. Copyright © McGraw-Hill Education Cellular Transport Diffusion of Liquids copyright cmassengale 13 Diffusion in a Cell Only CERTAIN things can diffusion in and out of the cell. Copyright © McGraw-Hill Education Cellular Transport Facilitated Diffusion Movement of materials across the plasma membrane using proteins. Like diffusion, facilitated diffusion requires NO energy. Channel Proteins Copyright © McGraw-Hill Education Carrier Proteins Cellular Transport Osmosis • Diffusion of water across a selectively permeable membrane Copyright © McGraw-Hill Education Cellular Transport Passive transport • Diffusion, facilitated diffusion, and osmosis DO energy! They are all forms of • NOT require any PASSIVE TRANSPORT. They all involve the movement of particles from HIGH to LOW concentration. Prior knowledge CFU: What does “passive” mean? Copyright © McGraw-Hill Education Cellular Transport Why does the movement of certain particles require energy, while others can be passively transported? Cell Membrane The cell membrane is Protective barrier to maintain homeostasis (balance) Regulate transport in & out of cell (selectively permeable) copyright cmassengale Cell Membrane The cell membrane is made of 2 layers of phospholipids called the lipid bilayer Cell Membrane Polar heads of phospholipids are hydrophilic “water loving”. Nonpolar tails are hydrophobic “water fearing” Makes membrane “Selective” in what crosses 21 Guided Practice 10 min • You have 4 cards in front of you: 1. 2. 3. 4. Diffusion Osmosis Facilitated diffusion Active transport • I will show you an example of one of these types of transports. • Think silently for 15 seconds. • When I say “Fold” put up your card or cards (you can use more than one!). • Don’t put up your card until you get the cue! What kind of transport? How do you know? What kind of transport? How do you know? What kind of transport? How do you know? What kind of transport? How do you know? What kind of transport? Movement of molecules from an area of HIGH concentration to an area of LOW concentration. How do you know? What kind of transport? How do you know? What kind of transport? Movement of molecules from an area of LOW concentration to an area of HIGH concentration. How do you know? What kind of transport? How do you know? 1 min Stop and Jot • What’s the difference between passive and active transport? • What are the three main types of passive transport? How are they alike? How are they different? Passive Transport I. Do Now II. Demo III. Reading to Learn IV. Guided Practice #1 V. Osmosis and Types of solutions VI. Guided Practice #2 VII. Independent Practice VIII.Exit Ticket IX. Closing and Questions “The advancement and diffusion of knowledge is the only guardian of true liberty.” – James Madison Turn and Talk Thinking about what you know about osmosis, what would happen if you drank very salty water? 3 types of Solutions From your reading, what are three types of solutions? What are the differences among these types of solutions? 3 Types of solutions What is a “solute”? – Hypotonic: a solution with a comparatively lower concentration of solutes compared to another – Hypertonic: a solution (e.g. extracelllular fluid) with higher solute concentration compared with another. – Isotonic: is a solution in which the concentration is the same as the solute concentration of another that is being compared. • The words hypertonic, have the same ending,– tonic, which is from the Greek tonos, meaning “tension.” The prefix hyper– is from the Greek hyper, meaning “over.” The prefix hypo– is from the Greek hypo, meaning “lower.” The prefix iso– is from the Greek isos, meaning “same”. What type of solution? __% NaCL 90% H2O ENVIRONMENT CELL 10% NaCL __% H2O What is the direction of water movement? equilibrium The cell is at _______________. 37 Cell in Isotonic Solution 10% NaCL 90% H2O ENVIRONMENT CELL 10% NaCL 90% H2O NO NET MOVEMENT What happens to the size of the cell? equilibrium The cell is at _______________. 38 What type of solution? 10% NaCL __% H2O CELL __% NaCl 80% H2O What is the direction of water movement? 39 Cell in Hypotonic Solution 10% NaCL 90% H2O CELL 20% NaCL 80% H2O What happens to the size of the cell? What is the direction of water movement? 40 What type of solution? 15% NaCL __% H2O ENVIRONMENT CELL __% NaCL 95% H2O What is the direction of water movement? 41 Cell in Hypertonic Solution 15% NaCL 85% H2O ENVIRONMENT CELL 5% NaCL 95% H2O What is the direction of water movement? What happens to the size of the cell? 42 Cells in Solutions 43 10 min Guided Practice #2 1. I will show you an animal cell in a beaker. (Not drawn to scale!) 2. On your whiteboard, answer the question on the slide. 3. Put up your whiteboards when I say, “Boards up!” What type of solution is the cell in? Will water move in or out of the cell? Answer What type of solution is the cell in? Will water move in or out of the cell? Answer What type of solution is the cell in? Will water move in or out of the cell? Answer What type of solution is the cell in? Will water move in or out of the cell? Answer What type of solution is the cell in? Will water move in or out of the cell? Answer What type of solution is the cell in? Will water move in or out of the cell? Answer 15 min Independent Practice • Complete the Independent Practice #1 worksheet in your guided notes. • Voice Level 0 Exit Ticket 8 min Complete the exit ticket silently and stack at your table group when you are finished. You may pack up your things. STOP Cards S T O P Summarize: Summarize the day’s lesson and what we learned. Trait: What IB trait relates to the lesson? Objective: Re-state in your own words and say whether or not we met that objective for the day. Purpose: What was the purpose of this lesson?