1 SEM CARDLESS ACC W/RAVEN TEXT
12th Edition
ISBN: 9781265321062
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 5, Problem 5A
A cell can use the process of facilitated diffusion to
a. concentrate a molecule such as glucose inside a cell.
b. remove all of a toxic molecule from a cell.
c. move ions or large polar molecules across the membrane regardless of concentration.
d. move ions or large polar molecules from a region of high concentration to a region of low concentration.
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a. Substance X is transported by passive transport and Substance Y is transported by active transport
b. Substance X is transported by active transport and Substance Y is transported by passive transport
c. Substance X is transported by active transport and Substance Y is transported by active transport
d. Substance X is transported by passive transport and Substance Y is transported by passive transport
one reason active transport has a limited maximum transport rate at which it can progress is due to the fact that
a. energy required is not available inside the cell
b. carrier proteins are not on the surface of the cell membrane
c. ion channels are limited in size
d. the number of carrier proteins is limited and therefore they can become saturated
Describe and explain the difference between:
a. Active and passive transport across a membrane. Give an example (can be broad) of a molecule that crosses a membrane for each mechanism.
b. Primary vs secondary active transport. Give an example of a molecule(s) that crosses a membrane for each mechanism.
Chapter 5 Solutions
1 SEM CARDLESS ACC W/RAVEN TEXT
Ch. 5.1 - Prob. 1LOCh. 5.1 - Explain the fluid mosaic model of membrane...Ch. 5.2 - List the different components of phospholipids.Ch. 5.2 - Prob. 2LOCh. 5.2 - Prob. 3LOCh. 5.3 - Illustrate the functions of membrane proteins.Ch. 5.3 - Prob. 2LOCh. 5.3 - Prob. 3LOCh. 5.4 - Compare simple diffusion and facilitated...Ch. 5.4 - Prob. 2LO
Ch. 5.4 - Prob. 3LOCh. 5.5 - Prob. 1LOCh. 5.5 - Prob. 2LOCh. 5.5 - Prob. 3LOCh. 5.6 - Distinguish between endocytosis and exocytosis.Ch. 5.6 - Illustrate how endocytosis can be specific.Ch. 5 - According to the fluid mosaic model, membranes are...Ch. 5 - Prob. 2IQCh. 5 - The fluid mosaic model of the membrane describes...Ch. 5 - What chemical property characterizes the interior...Ch. 5 - The transmembrane domain of an integral membrane...Ch. 5 - The specific function of a membrane within a cell...Ch. 5 - The movement of water across a membrane is...Ch. 5 - Prob. 6UCh. 5 - Which of the following is NOT a mechanism for...Ch. 5 - A bacterial cell that can alter the composition of...Ch. 5 - What variable(s) influence(s) whether a nonpolar...Ch. 5 - Which of the following does NOT contribute to the...Ch. 5 - How are active transport and coupled transport...Ch. 5 - A cell can use the process of facilitated...Ch. 5 - figure 5.5 describes a classic experiment...Ch. 5 - Each compartment of the endomembrane system of a...Ch. 5 - The distribution of lipids in the ER membrane is...
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- Cells transport sodium ions out of the cell against the sodium concentration gradient. This is an example of: a. facilitated diffusion b. simple diffusion c. diffusion via channel proteins d. endocytosis e. active transportarrow_forwardsecondary active transport depends on which of the following principles? a. sodium is pumped out of the cell against a concentration gradient by primary active transport b. sodium moves out of the cell with a concentration gradient c. primary active transport is necessary to pump sodium into the cell from a higher to lower concentration d. diffusion causes sodium to move out of the cellarrow_forwardsecondary active transport depends on which of the following principals a. sodium is pumped pout of the cells against a concentration gradient by [primary active transport b. sodium moves out the cells with a concentration gradient c. primary active transport is necessary to pump sodium into the cell from higher to lower concentration d. diffusion causes sodium to move our of the cellarrow_forward
- Which of these statements about facilitated diffusion is true?a. In facilitated diffusion, net movement is down the concentrationgradient.b. Facilitated diffusion requires the expenditure of energy.c. Facilitated diffusion does not require a carrier protein.d. Facilitated diffusion moves materials through ion pumps.e. Facilitated diffusion moves materials in vesicles.arrow_forwardWhich of the following statements is/are true about transport proteins?I. They carry out biochemical functions that remove nutrients in a cell.II. They are proteins which have high specificity to a single kind of molecule.III. They function to accumulate solutes against the concentration gradient.IV. They are highly regulated in a cell.arrow_forwardGlucose is transported across the cell membrane of intestinal cells. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells? A facilitated diffusion B simple diffusion C osmosis D concentration gradientarrow_forward
- If the concentration of a solute is the same both inside and outside the cell, what might you expect with regard to its transport by a membrane protein? A. Since there is no concentration gradient, no transport either in or out of the cell is possible. B. The transport protein has been saturated. C. The solute must be phosphorylated with a phosphate group from ATP before further transport can occur. D. Movement of the solute across the membrane could occur and cause accumulated on one side of the membrane by an active transport protein. The concerted model of allosteric regulation is different from the sequential model, because: A. The concerted model is used to explain homotropic effects B. The sequential model is used to explain heterotropic effects C. Both A and B D. Neither A nor Barrow_forwarda. Define diffusion. Is diffusion a passive or an active process? Explain how solute moves in this way. b. Use your knowledge of diffusion to explain what happened over time when you observed a crystal of methylene blue dropped into a beaker of water. Be sure to use equilibrium in your explanation. c. Explain your observations over time after a drop of methylene blue and a drop of potassium permanganate were placed in the agar. What factors affect the rate of diffusion? d. What are tissues? Name the four major types of tissues in the human body. e. Name the three primary germ layers. Name the primary germ layers from which epithelial tissues and connective tissues develop. f. List general characteristics that all epithelial tissues have in common. g. Name the functions of epithelial tissue. Which type of epithelial tissue is found in areas that need protection? h. Know how to identify simple squamous epithelium, simple cuboidal epithelium, simple columnar…arrow_forwardThe main force driving movement in diffusion across membranes is due to A. concentration gradients B. Size of the molecules C. Membrane surface area D. Temperature Questionarrow_forward
- Which of the following statements about "leak channels" in the plasma mem- brane is correct? A. Proteins that form these channels bind to solutes to allow them to pass into the cell. B. They are passageways formed by proteins to allow water and ions to move passively through the membrane. C. They allow small ions and molecules to move between adjacent cells. D. They are formed by glycoprotein and proteoglycans to allow hormones to enter cells.arrow_forwardLiver cells in culture were kept at 0°C and treated with trypsin to digest the receptors on the cell surface. The temperature was then raised to 37°C and radioactive LDL was added to the culture media. Several hours later, the labeled LDL was found to be inside the cells. This specific process of LDL uptake is A. active transport B. facilitated diffusion C. phagocytosis D. pinocytosis E. receptor-mediated endocytosisarrow_forwardFacilitated transport differs from diffusion in that facilitated diffusiona. involves the passive use of a carrier protein.b. involves the active use of a carrier protein.c. moves a molecule from a low to a high concentration.d. involves the use of ATP molecules.arrow_forward
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