Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 7, Problem 14TYK
Summary Introduction
Introduction: Action potentials are created by a particular variety of voltage-gated ion channels implanted in the cellular plasma membrane. The membrane potential in steady-state conditions where the flow of ions becomes positively or negatively charged across the plasma membrane is stabilized, as there is no further difference in charge accumulation across the membrane. It is called as resting membrane potential.
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Chapter 7 Solutions
Study Guide for Campbell Biology
Ch. 7 - Label the components in the following diagram of a...Ch. 7 - a. Cite some experimental evidence that indicates...Ch. 7 - List the six major functions that membrane...Ch. 7 - What types of molecules have difficulty crossing...Ch. 7 - A solution of 1 M glucose is separated by a...Ch. 7 - a. What osmotic problems does the freshwater...Ch. 7 - Prob. 7IQCh. 7 - Prob. 8IQCh. 7 - a. How is cholesterol transported into human...Ch. 7 - Create a concept map to illustrate your...
Ch. 7 - The following diagram illustrates passive and...Ch. 7 - If a single layer of phospholipids coats the water...Ch. 7 - Glycoproteins and glycolipids are important for a....Ch. 7 - Prob. 3TYKCh. 7 - Prob. 4TYKCh. 7 - Prob. 5TYKCh. 7 - Use the following U-tube setup to answer questions...Ch. 7 - Use the following U-tube setup to answer questions...Ch. 7 - Use the following U-tube setup to answer questions...Ch. 7 - How much work is expended in diffusion? a. an...Ch. 7 - Prob. 10TYKCh. 7 - Prob. 11TYKCh. 7 - Water passes quickly through cell membranes...Ch. 7 - Facilitated diffusion of ions across a cellular...Ch. 7 - Prob. 14TYKCh. 7 - Which of the following describes cotransport? a....Ch. 7 - Prob. 16TYKCh. 7 - An animal cell moves potassium against its...Ch. 7 - Prob. 18TYKCh. 7 - Prob. 19TYKCh. 7 - In response to low blood pressure, the adrenal...
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- The energy source for movements of Na* and K* during an action potential is a. the Na*/K* ATPase b. the thermal energy in the cell membrane c. the concentration gradients for the ions d. determined by the lipids of the cell membrane e. the negative charge of the extracellular fluid relative to the cytosolarrow_forwardCompare channels and transporters. Channels are __________, and transporters are __________. Select one: a. slower, more selective b. Less selective, slower c. faster, less selective d. slower, less selective e. more selective, fasterarrow_forwardDescribe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.arrow_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_forwardI. Metabolism is the elimination of metabolic wastes including nitrogenous wastes produced from the breakdown of proteins. II. Diffusion is the movement of water from a region of higher osmolarity to a region of lower osmolarity across a selectively permeable membrane. A. If the two statements are both correct B. If the first statement is correct while the second one is not C. If the second statement is correct while the first one is not D. If the two statements are both incorrect I. The functional units of the kidney where urine is formed. II. Kidneys serve as specialized organs for osmoregulation and excretion A. If the two statements are both correct B. If the first statement is correct while the second one is not C. If the second statement is correct while the first one is not D. If the two statements are both incorrectarrow_forwardThe pathway that can move highest rates of sodium ions is: A. Sodium channels B. Sodium pumps-ATPases C. Sodium exchangers D. Sodium diffusion in solutionarrow_forward
- Which of the following describes how osmosis occurs across a cell membrane/ A. Solutes move from an area of high water concentration to an area of low water concentration. B. Water moves from an area of low solute concentration to an area of high solute concentration. C. Both water and solutes move across the cell membrane from an area of high concentration to an area of low concentration. D. Solutes move from an area of low solute concentration to an area of high solute concentration. E. Water moves from an area of high solute concentration to an area of low solute concentration.arrow_forwardWhich of the following will saturate as solute concentration increases? a. Transport of sucrose down its concentration gradient by the carrier protein GLUT2 b. Transport of chloride ions out of the endoplasmic reticulum and into the cytoplasm via a channel protein c. Engulfing of a pathogen by a white blood cell during an immune response d. All of the abovearrow_forwardMolecule X binds to a receptor that works as an ion channel. Which of the following must betrue of this receptor?A. It allows passage of only one type of ion.B. It is found in the cytosol of the cell.C. It is voltage dependent.D. It is slow to produce a response in the cell.arrow_forward
- The negatively charged intracellular environment and resulting resting membranepotential of neurons and muscle cells fundamentally develops because of:A. the presence of a high extracellular potassium concentration.B. the presence of negatively charged intracellular proteins.C. the high electron concentration found in the extracellular fluidsD. the presence of voltage-gated-sodium channellsarrow_forwardMembrane carriers resemble enzymes except for the fact that carriersa. are not proteins.b. do not have binding sites.c. are not selective for particular ligands.d. change conformation when they bind a ligand.e. do not chemically change their ligands.arrow_forwardWhen a cell is placed in a hypotonic solution,a. solute exits the cell to equalize the concentration on both sides ofthe membrane.b. water exits the cell toward the area of lower solute concentration.c. water enters the cell toward the area of higher soluteconcentration.d. there is no net movement of water or solute.arrow_forward
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