Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 5, Problem 4TYK
A characteristic of carrier molecules in a primary active transport pump is that:
a. they cannot transport a substance and also hydrolyze ATP.
b. they retain their same shape as they perform different roles.
c. their primary role is to move negatively charged ions across membrances.
d. they move Na+ into a neural cell and K+ out of the same cell.
e. they act to establish an
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Which of the following is incorrect about membrane transport systems?
a.
Glucose transport in red blood cells is a uniport system
b.
The Na+/K+ ATPase is an antiport system
c.
The H+/K+ ATPase is an active transport system
d.
The chloride-bicarbonate exchanger in erythrocytes is a uniport system
ABC transporters are:
a. An example of active transport with activity in multi-drug resistance.
b. An example of passive-mediated transport with activity in multi-drug resistance.
c. An example of an ion channel that binds ATP for effective transport.
d. An example of a pump involved in Ca2+ transport.
e. An example of an antiporter.
Which of the following statements is correct?
A. A transmembrane integral protein is required for a lipophilic solute to move through the plasma membrane.
B. The net movement of water through a cell membrane is dependent on both the osmotic gradient and the presence of transmembrane channel proteins?
C. The membrane permeability for an ion is determined in part by the number of open unipart carriers for that ion in the membrane?
D. Both A and B are correct & C is incorrect
E. A, B, & C are all correct
Please explain! Thank you so much
Chapter 5 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 5.1 - Describe the fluid mosaic model for membrane...Ch. 5.1 - Give two examples each of integral proteins and...Ch. 5.2 - What is the difference between passive and active...Ch. 5.2 - Prob. 2SBCh. 5.3 - Prob. 1SBCh. 5.3 - Prob. 2SBCh. 5.4 - Prob. 1SBCh. 5.4 - Prob. 2SBCh. 5.5 - Prob. 1SBCh. 5.5 - Prob. 2SB
Ch. 5 - In the fluid mosaic model: plasma membrane...Ch. 5 - Which of the following statements is false?...Ch. 5 - The freeze-fracture technique demonstrated: a....Ch. 5 - A characteristic of carrier molecules in a primary...Ch. 5 - A driving ion moving through a membrane channel in...Ch. 5 - Phagocytosis illustrates which phenomenon? a....Ch. 5 - Place in order the following events of...Ch. 5 - Prob. 8TYKCh. 5 - Which of the following statements is true for the...Ch. 5 - Using the principle of diffusion, a dialysis...Ch. 5 - Discuss Concepts The bacterium Vibrio cholera...Ch. 5 - Prob. 12TYKCh. 5 - Prob. 13TYKCh. 5 - Prob. 15TYKCh. 5 - Some cancer cells are insensitive to typical...Ch. 5 - Some cancer cells are insensitive to typical...
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- Below are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a. Both primary and secondary transport moves solutes against their concentration gradients. b. The primary active transport prepares the conditions of the membrane gradient by making the extracellular membrane slightly more negative than the intracellular membrane. c. The primary active transport uses ATP while secondary active transport helps replenish ATP.arrow_forwardThe contraction of cardiac muscle cells results from the increase in calcium ion levels in the cytosol. For the cells to relax, an antiport removes calcium ion from the cytosol for every sodium ion that is taken in. Digitalis is a drug that is used to make the heart contract more strongly. This drug partially inhibits the Na+-K+ ATPase in the cardiac cells. Applying the concepts about membrane transport, answer the following: a. Propose an explanation for the drug’s effect.b. What will likely happen if too much of the drug is taken in? Why?arrow_forwardHow do electroneutral co-transporters depend on the transmembrane potential? Select one: a. They depend on the transmembrane potential to some extent b. They are completely independent of the transmembrane potential c. They very slightly depend on the transmembrane potential d. They strongly depend on the transmembrane potentialarrow_forward
- Below are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a.The primary active transport uses external chemical energy. b.The sodium-potassium pump which is an example of primary active transport is considered as the most important pump. c. In primary active transport, the energy is derived secondarily from energy that has been stored in the form of ionic concentration differences between the two sides of a membrane.arrow_forwardThe 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_forwardThe membrane transport protein Na+-K+ ATPase carries both Na+ and K+ ions across the plasma membrane. Typically the concentration of K+ inside cells is about 30 times higher inside the cell than outside. The concentration of Na+ is about 20 times less inside the cell than outside. Based on this information, which statement below is false? A. The proper functioning of Na+-K+ ATPase could serve as an energy source for secondary active transport proteins. B. It is a symport. C. Transport of Na+ and K+ must be coupled to an exergonic reaction. D. Na+-K+ ATPase likely undergoes conformational changes during transport.arrow_forward
- Among the membrane transporters, the channels require energy and therefore are involved in active transport. * D. Disagree, because channels are not proteins and therefore are not involved in active tranport. A. Agree, because channels are associated with H+-ATPase. B. Disagree, because the pumps are the ones involved in active transport. C. Agree, because channels are proteins involved in active transport.arrow_forwardBelow find the structures for ibogaine and cocaine. Ibogaine and cocaine inhibit the dopamine active transporter (DAT). This transporter is a secondary active transporter, and depends on the primary active transporter Na+/K+ ATPase. Ibogaine had a Kι = 2 μM, and cocaine a Kι = 0.64 μM respectively. (a) Define secondary active transport. (b) Is ibogaine an effective treatment for cocaine based on DAT binding?arrow_forwardone 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 saturatedarrow_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_forwardName at least one similarity and at least one difference between the following (it may help to review the definitions of the terms using the glossary):A. Symport and antiportb. Active transport and passive transportC. Membrane potential and electrochemical gradientD. Pump and transporterE. Axon and telephone wireF. Solute and ionarrow_forwardThe 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_forward
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