Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 5, Problem 6TY
Summary Introduction
Introduction:
The sodium-potassium pump is one of the membrane protein that helps to maintain this gradient by pumping three Na+ ions out of the cell for every two K+ ions inside the cell. The sodium-potassium pump operates continuously.
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Which of the following statements best describes the movement of molecules in a cell if its concentration on both sides is the same?
Group of answer choices
The molecules will stop moving across the membrane.
The molecules will continue to move across the membrane in both directions.
The molecules will move across the membrane to the outside of the cell.
The molecules will move across the membrane to the inside of the cell.
if a cell has a net positive charge inside and there is a net negative charge outside the cell, which of the following is correct (if the membrane is permeable to each substance and the concentration of each is the same inside and outside the cell)?
a. negative ions will move into the cell
b. positive ions will move into the cell
c. neutral ions will move into the cell
d. negative ions will move our of the cell
Cotransport is ____________
movement of water down concentration gradient using a protein channel
movement of materials against their concentration gradient
movement of one substance against, and one substance down their concentration gradients
movement of molecules from high concentration to low concentration using no protein channels
movement of materials down their concentration gradient using a protein channel
Chapter 5 Solutions
Principles of Biology
Ch. 5.1 - Which of the following is not a characteristic of...Ch. 5.1 - Prob. 2TYKCh. 5.2 - In an animal cell, how can changes in lipid...Ch. 5.2 - Prob. 2CCCh. 5.2 - Prob. 1TYKCh. 5.2 - Which of the following changes would make a...Ch. 5.3 - Prob. 1BCCh. 5.3 - Prob. 1CCCh. 5.3 - Prob. 2BCCh. 5.3 - Prob. 2CC
Ch. 5.3 - Prob. 1TYKCh. 5.3 - Prob. 2TYKCh. 5.4 - Prob. 1CCCh. 5.4 - Prob. 1TYKCh. 5.4 - Prob. 2TYKCh. 5.5 - Prob. 1BCCh. 5.5 - Prob. 1TYKCh. 5.6 - Prob. 1CCCh. 5.6 - A form of endocytosis that involves the formation...Ch. 5.7 - Prob. 1CCCh. 5.7 - Prob. 2CCCh. 5.7 - Prob. 1BCCh. 5.7 - Anchoring junctions that adhere adjacent animal...Ch. 5 - Which of the following statements best describes...Ch. 5 - Which of the following events in a biological...Ch. 5 - Prob. 3TYCh. 5 - Carbohydrates of the plasma membrane are bonded to...Ch. 5 - Which of the following movements would not be an...Ch. 5 - Prob. 6TYCh. 5 - Prob. 7TYCh. 5 - What features of a membrane are a major...Ch. 5 - Prob. 9TYCh. 5 - Large particles can be brought into the cell by...Ch. 5 - With your textbook closed, draw and describe the...Ch. 5 - Describe two different ways that integral membrane...Ch. 5 - A principle of biology is that living organisms...Ch. 5 - Prob. 1CBQCh. 5 - With regard to bringing solutes into the cell...
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- When a cell is placed in a solution with a very low solute concentration,water diffuses into the cell.Such a solution is called.... solute. Cell shrinking,also known as crenation,occurs a cell is placed into a(n)..... solution. The sodium-potassium pump moves. coupleted transport that involves the moving of one substance against its concentration gradient by using energy from a second substance moving down its concentration gradient is known as ... The release of neurotransmitter from a neuron is an example of.... The uptake of cholesterol into cells is an example of.... When a cell surrounds a large particle with pseudopodia and then engulfs it,the process is called... When a ligand binds to them,.... receptors directly phosphorylate enzymes within the cell.arrow_forwardWhat would happen if all of the Na+/K+ pumps in a cell stopped working? One of the other transport proteins will immediately take over The voltage across the membrane will immediately get more negative The voltage across the membrane will immediately get more positive Nothing will change Gradients and voltage across the membrane will slowly run down All of the abovearrow_forwardA cell has a membrane potential of -100 mV (more negative inside than outside) and has 1,000 times more calcium ions outside the cell than inside. Which best describes a mechanism by which Ca2+ enters this cell? facilitated diffusion of Ca2+ into the cell down its electrochemical gradient movement of Ca2+ into the cell through an ion channel down its concentration gradient passive diffusion of Ca2+ into the cell down its electrochemical gradient cotransport of Ca2+ into the cell with Cl- movement of Ca2+ into the cell through a carrier protein down its electrical gradient I know that the answer is 1 but please explain why. Thank you.arrow_forward
- What is the normal concentration of sodium and potassium inside a cell compared to outside the cell? A. The normal concentration of sodium inside the cell is low and potassium is high. Whereas outside of the cell the concentration of sodium is high and potassium is low. B. The normal concentration of sodium inside the cell is high and potassium is low. Whereas outside of the cell the concentration of sodium is low and potassium is high.arrow_forwardThe electrochemical gradient across the plasma membraneGroup of answer choices is caused by more sodium on the inside of the cell relative to the outside of the cell Contains stored potential energy that can be harvested by the cell is caused solely by the sodium/potassium ATPase is a form of kinetic energy that can be harvested by the cell All of the abovearrow_forwardWhich of the following is the most accurate definition of concentration gradient? A. Difference in the number of molecules that cross a cell membrane B. Different types of solute molecules found inside and outside a cell C. Different in the amount of a molecule inside and outside a cell D. Difference in the number of molecules on one side of a cell membranearrow_forward
- Which of the following stimulus or stimuli may cause protein channels involved in membrane transport to open or close: Change of voltage across the membrane. Mechanical stress. Ligand binding. All of the above. None of the above.arrow_forwardIf I have a higher concentration of water inside my cells , which is low concentration of solute inside the cells the makes my cell swell and it cause hypotonic. Is that true? I am confused having low concentration of solute inside not outside of the cell right? Is itarrow_forwardWhich of the following regarding the sodium potassium pump is FALSE? It tends to be found on the apical plasma membrane of polarized cells It transports three sodium ions to the outside of the cell It transports two potassium ions to the inside of the cell. It helps to maintain unequal distribution of ions across the plasma membranearrow_forward
- The resting membrane potential is established by? The Na+/K+-ATPase pumping Na+ into the cell and K+ out of the cell The Na+/K+-ATPase pumping K+ into the cell and Na+ out of the cell A larger diffusion of K+ out of the cell compared to diffusion of Na+ into the cell A larger diffusion of K+ into the cell compared to diffusion of Na+ out of the cell a) and d) b) and c)arrow_forwardWhen a visual pigment absorbs photons of light, it changes its molecular shape and at the same time releases energy. The release sets off a chain of chemical events leading to an electrical signal. The last event described is ________. transduction integration conduction stimulationarrow_forwardWhich of the following is true about the movement of ions across excitable living membranes? Ions can move passively across membranes through leakage channels Some ions are prevented from moving down their concentration gradient by ATP-driven pumps. Ion gates in the membrane can open in response to electrical potential changes. All of these are correct.arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license