Please answer all of them tahnks!! 7. Circle T if the statement is true and F if otherwise.T F 7.TF 8.TF 9.TF 10.Concentration gradient refers to the tendency of particles of any kind to spreadout evenly in an available space.The ability of the surrounding solution to cause the cell to gain or lose waterrefers to tonicity.In endocytosis, a depression in the plasma membrane pinches in and forms avesicle enclosing the material that had been outside the cell.Facilitated transport is a process that needs an input of energy to enablesubstances to diffuse down its concentration gradient.In 1-2 sentences, answer the following questions.pentaxela, nohnagang to menne1. Why is the current model of the plasma membrane called the "Fluid Mosaic Model"?alamex2. What molecules assist the process of facilitated diffusion?neveid niso po3. What are the factors that affect the rate of diffusion?POATUTI0₂ apribsaft 19 onsLet's Evaluate1. Match the processes in column A to the terms in column B.ort to 290 ol" 1919vlishAveolojzyna Isnin pololay 19.to Ismuol sphen "ng1. The substance is packaged in vesicles, fuses withthe plasma membrane, and will be released out of the cellWay, and moder vin les look a2. Unassisted movement of solutes base onthe difference of concentration from higher to lowerconcentration between two regions sobiaire an input of3. Membrane channels that require anenergy to change shape and allow the passage of ionssibem-9 4. Passage of water across a semi-permeableof higher concentration to lowermembrane from the side of higherconcentration brit to lebom piszom biult or nealolobne ovsu ,oons 3Ba. Diffusion5. Bulky materials are taken in by forming membranefolds or vesicles which will be digested by cell enzymesprinn 6. How larger molecules pass through the cellmembrane through channels without using energy91012bredhMb. Endocytosisc. Exocytosisw waibd. Facilitated diffusiongoxmasollevannsól nemjemeinicdoe. Osmosisboid "aiactyoobnef. Phagocytosis2 hapni2mam:g. Pinocytosisenlegiwohst insbutah. Sodium-potassium pump

Concentration gradient occurs when the concentration of particles is higher in one area than…

T F 8. TF 9. TF 10. Concentration gradient refers to the tendency of partic out evenly in an available space. lo moi britan The ability of the surrounding solution to cause the cell to gain or lose water refers to tonicity. Spread In endocytosis, a depression in the plasma membrane pinches in and forms a vesicle enclosing the material that had been outside the cell. Facilitated transport is a process that needs an input of energy to enable substances to diffuse down its concentration gradient. deplor In 1-2 sentences, answer the following questions. to 1. Why is the current model of the plasma membrane called the "Fluid Mosaic Model"? alamex 2. What molecules assist the process of facilitated diffusion? Osveid psw.ntha 3. What are the factors that affect the rate of diffusion? POA

T F 8. TF 9. TF 10. Concentration gradient refers to the tendency of partic out evenly in an available space. lo moi britan The ability of the surrounding solution to cause the cell to gain or lose water refers to tonicity. Spread In endocytosis, a depression in the plasma membrane pinches in and forms a vesicle enclosing the material that had been outside the cell. Facilitated transport is a process that needs an input of energy to enable substances to diffuse down its concentration gradient. deplor In 1-2 sentences, answer the following questions. to 1. Why is the current model of the plasma membrane called the "Fluid Mosaic Model"? alamex 2. What molecules assist the process of facilitated diffusion? Osveid psw.ntha 3. What are the factors that affect the rate of diffusion? POA

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 3TYK: The freeze-fracture technique demonstrated: a. that the plasma membrane is a bilayer with individual...

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33. Which statements concerning passive and active transport are correct? A. Both passive and active transport requires cell energy B. Passive requires cell energy while active transport does not C. Active transport requires cell energy while passive does not D. Neither passive nor active transport requires cell energy
28. What could be inferred about the level of concentration of the solution inside and outside of the cell in Solution C before any movement of water had taken place? A. The percentage of solution concentration inside and outside the cell is equal B. The percentage of solution concentration inside and outside the cell is constant. C. The percentage of solution concentration inside the cell is greater than outside the cell D. The percentage of solution concentration inside the cell is lesser than outside the cell
31. What will cause the cell to shrink when placed in hypertonic solution? A. No difference in concentration of water molecules inside and outside the cell B. Constant concentration of water molecules inside and outside the cell C. Lower concentration of water molecules inside the cell than outside D. Greater concentration of water molecules inside the cell than outside
Describe two ways that decreasing temperature would affect the rate of diffusion of molecules across a cell’s plasma membrane.
16. An electrochemical gradient is formed if a. ions move across a membrane. b. ion concentration changes on one side of a membrane. c. energy is released. d. salts are produced. e. ATP →ADP + Pi
Quantitative – diffusion time: Consider a spherical, single-celled organism which needs oxygen tosurvive. a. Assume oxygen needs to diffuse from the outside of the cell to its center. Write an equation thatgives the diffusion time in terms of the cell radius. b. The cell has a 4 micron (m) diameter, and diffusion coefficient of oxygen is 1.8 x 10-5 cm2/s inwater (assume diffusion is the same through the cell membrane). How long does it take for oxygento diffuse to the center of the cell? c. Cells typically need key molecules such as oxygen to survive. Diffusion times of oxygen can limithow big cells can become. If the cell gets too large for oxygen to reach its center, the cell coulddie. Calculate the size of a cell at which oxygen diffusion time becomes too slow and so limits theability of the cell to get that big. Explain your assumptions. How does this compare to typical cellsizes?
Q4: Describe the structure of plasma membrane. Suggest the mechanism(s) by which each of the following substances is transported across cell membranes: a. CO2 b. Glucose c. C1– d. K+ e. Fat molecules
25. For a Paramecium shifted from from a hypo-osmotic to an iso-osmotic environment, you would expect the activity of its contractile vacuole to .... a) increase. b) decrease. c) remain unchanged.
Solutes tend to diffuse from a region where they are _______ concentrated to an adjacent region where they are _______ concentrated. a. more, less b. less, more c. movement is independent of concentration
The freeze-fracture technique demonstrated: a. that the plasma membrane is a bilayer with individual proteins suspended in it. b. that the plasma membrane is fluid. c. that the arrangement of membrane lipids and proteins is symmetric. d. that proteins are bound to the cytoplasmic side but not embedded in the lipid bilayer. e. the direction of movement of solutes through the membrane.
Compare the roles of the glycocalyx, extracellular matrix, and cell wall.
Osmosis Pre-Lab Question Research the structures that protect plant and animal cells from damage resulting from osmotic pressure. Write a few sentences explaining what they are, how they work, and where they are located.