EBK BIOLOGY TODAY AND TOMORROW WITHOUT
5th Edition
ISBN: 8220100557187
Author: STARR
Publisher: CENGAGE L
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Chapter 4, Problem 4FIO
Summary Introduction
To determine: Which fluid is hypotonic: extracellular fluid or cytoplasm from the given figure.
Introduction: Lipids bilayers are selectively permeable. Substances such as gases, hydrophobic molecules, and water can diffuse through the lipid bilayers, whereas solutes such as polar molecules and ions cannot diffuse. If two fluids that have different solute concentration are separated by a lipid bilayer, then the water diffuses across it. The direction in which the water moves depend on the relative solute concentration of both the fluids. The relative solute concentration is described in terms of tonicity and it is of two types, hypotonic and hypertonic.
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In figure 4-7 why does facilitated diffusion have a maximum rate of diffusion?

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Chapter 4 Solutions
EBK BIOLOGY TODAY AND TOMORROW WITHOUT
Ch. 4 - Figure 4.5 Energy inputs and outputs in chemical...Ch. 4 - Figure 4.10 Enzymes, temperature, and pH. Each...Ch. 4 - Prob. 3FIOCh. 4 - Prob. 4FIOCh. 4 - The genus Ferroplasma consists of a few species of...Ch. 4 - Prob. 2DIDCh. 4 - Prob. 3DIDCh. 4 - Prob. 1SQCh. 4 - Prob. 2SQCh. 4 - Prob. 3SQ
Ch. 4 - Prob. 4SQCh. 4 - Prob. 5SQCh. 4 - Prob. 6SQCh. 4 - Prob. 7SQCh. 4 - Prob. 8SQCh. 4 - Ions or molecules tend to diffuse from a region...Ch. 4 - Prob. 10SQCh. 4 - Prob. 11SQCh. 4 - Prob. 12SQCh. 4 - A transport protein requires ATP to pump sodium...Ch. 4 - Prob. 14SQCh. 4 - Prob. 15SQCh. 4 - Prob. 1CTCh. 4 - Water molecules tend to diffuse in response to...Ch. 4 - Dixie Bee wanted to make JELL-O shots for her next...Ch. 4 - The enzyme trypsin is sold as a dietary enzyme...Ch. 4 - Prob. 5CT
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- Diffusion and osmosis classification Classify the following characteristics based on whether they are describing diffusion, osmosis, or both. Diffusion Results in an Can occur with equal distribution of solute molecules or without a membrane Always involves the movement of water Requires a semi-permeable membrane Osmosis Involves the movement of gases, ions, and small water soluble molecules Passive form of movement that requires no energy Moves from areas of high concentration to low Both Diffusion and Osmosis Responsible for gas exchange in the lungs concentration A 3 of 15 Next > Cation to open the document "Epicinstaller-13.0.0-fortnite-a8e4f12cada646caa706d8be407be69f (3).msi". tv 22arrow_forwardWhich of the following are features of facilitated diffusion? There may be more than one correct answer, select all that apply. Requires energy Movement assisted by proteins Can include passive diffusion Depends on ATP hydrolysis Can include ion transport down its concentration gradient in a cell (high to low concentration)arrow_forwardWhat is NOT true about diffusion: 1. A form of passive transport. 2. Uses adenosine triphosphate to transport substances across the plasma membrane. 3. Tendency of molecules to move from an area of higher concentration to an area or lower concentration. 4. Classified as either facilitated diffusion or simple diffusion.arrow_forward
- Which of the following are features of facilitated diffusion? Select all that apply. lon transport with its concentration gradient (from high to low) lon transport that requires energy lon transport assisted by proteins lon transport associated with ATP hydrolysisarrow_forwardDiffusion requires a membrane to occur. True Falsearrow_forwardCrossing a cell membrane by simple diffusion can be distinguished from facilitated diffusion by which of the following: Select all that apply. Simple diffusion moves molecules down a concentration gradient while facilitated diffusion moves molecules up a concentration gradient Simple diffusion does not require membrane proteins; facilitated diffusion requires specific membrane proteins Simple diffusion does not require energy; facilitated diffusion requires energy Simple diffusion is not saturable; facilitated diffusion rates are limited by the number of functional membrane proteins and can be saturatedarrow_forward
- Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane? OOO The rate of transport is saturable. It is highly specific for the molecule being transported. All of the answers are correct. Its rate is higher than that of simple diffusion of the molecule. The direction of transport is determined by concentration and/or electrochemical gradients.arrow_forwardSimple and facilitated diffusion differ because _____________. simple diffusion requires the presence of a transport protein within the plasma membrane, while facilitated diffusion does not ions being transported by simple diffusion move against their electrochemical gradients, while ions being transported by facilitated diffusion move along their electrochemical gradients 3.facilitated diffusion requires the presence of a transport protein within the plasma membrane, while simple diffusion does not 4. ions being transported by simple diffusion move along their electrochemical gradients, while ions being transported by facilitated diffusion move against their electrochemical gradientsarrow_forwardWhich of the following statements about diffusion is correct? It is an active process in which molecules move from a region of lower concentration to one of higher concentration. It is very rapid over long distances. It requires an expenditure of energy by the cell. It is a passive process in which molecules move from a region of lower concentration to a region of higher concentration. It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.arrow_forward
- In your own words, describe one similarity and one difference between diffusion via channels (like aquaporins) and facilitated diffusion.arrow_forwardWhich of the following statements is correct about passive facilitated diffusion? (select all that apply) V It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient). O It requires a transport protein. O It requires an expenditure of energy by the cell. O It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient). O It involves movement of molecules up a concentration gradient and requires a transport protein.arrow_forwardGive one way in which active transport differs from facilitated diffusionarrow_forward
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