Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214114
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Textbook Question
Chapter 3, Problem 9LTB
Which of the following forms of membrane transport require specific membrane proteins?
- diffusion;
- exocytosis;
- facilitated diffusion;
- active transport;
- facilitated diffusion and active transport
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What is the difference between primary and secondary active transport?
primary active transport is a more important and necessary reaction
secondary active transport moves two molecules whereas primary transport only moves one
molecule
primary active transport involves ATP while secondary active transportdoes not
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.
Which of the following statements is NOT TRUE about membrane transport?
to facilitate movement of ions and molecules across membranes.
to move food, water, and wastes around, into, and out of a cell.
to get rid of duplicated organelles in a cell.
to transport proteins, lipids, and other molecules synthesized by the cell.
Chapter 3 Solutions
Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
Ch. 3 - Prob. 1LTBCh. 3 - Add labels to the figure that follows, which...Ch. 3 - Prob. 3LTBCh. 3 - Which of the following is not a function of water?...Ch. 3 - Prob. 5LTBCh. 3 - Prob. 6LTBCh. 3 - Prob. 7LTBCh. 3 - Prob. 8LTBCh. 3 - Which of the following forms of membrane transport...Ch. 3 - Prob. 10LTB
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Facilitated diffusion differs from active transport in that facilitated diffusion transports against a concentration gradient while active transport does not facilitated diffusion requires expenditure of energy while active transport does not active transport requires expenditure of energy while facilitated diffusion does not facilitated diffusion involves carrier proteins while active transport does not facilitated diffusion works against a concentration gradient while active transport works only with the concentration gradientarrow_forwardWhat type of cellular transport do Epithelial sodium channels (ENaC)s perform? Group of answer choices Simple diffusion Secondary active transport Facilitated diffusion Primary active transportarrow_forwardDifferentiate the following: simple diffusion; facilitated diffusion Facilitated diffusion, active transport Endocytosis; exocytosis(in terms of purpose, substance transported, direction of motion of the vesicle) Bulk flow; cytoplasmic streamingarrow_forward
- Which 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_forwardWhich of the following would be most likely to move across the membrane without a transport protein? Water, because it is small and polar O2 (molecular oxygen), because it is small and nonpolar A cation, because it is small and positively charged An anion because it is small and negatively chargedarrow_forwardClassify each phrase based on whether it describes or gives an example of passive transport, facilitated diffusion, both processes, or neither. Passive transport glucose transport across a membrane Facilitated diffusion cholesterol transport across a membrane protein-assisted movement. Answer Bank Both movement to an area of lower concentration. movement across a membrane Neither requires an input of energyarrow_forward
- Passive transport across the membrane mediated by a carrier— would not be saturated by increasing amount of substance to be transported. does not require energy (ATP). can be driven in reverse. moves the solute through the membrane in the “uphill” direction of their concentration gradient. is faster than transport mediated by channel proteins.arrow_forwardWhat is a main difference between active and passive transport? active transport is spontaneous active transport requires an energy input (ATP) passive transport can move molecules against their concentration gradient active transport uses a protein while passive transport does notarrow_forwardWhich of the following is true regarding bulk transport? ATP is required to pump molecules against the concentration gradient Bulk transport is an example of passive transport Transport of large quantities of materials ATP changes the shape of a protein channel during active transportarrow_forward
- Which of the followings is not true about the function of the Tight Junctions? (LO- K8) They hold the cells together They act as a barrier They help maintain cell polarity They prevent lateral diffusion of proteins, ions, molecules They play an important role in maintaining the blood brain barrier They connect the adjacent cells intercellularly to the intermediate cytoskeletal filamentsarrow_forwardWhich one of the following pieces of evidence would prove that a substance enters a cell by.active rather than passive transport? The substance being moved is water The substance enters the cell by going down its gradient The breakdown of ATP is needed The substance is moved across the cell membrane by a carrier proteinarrow_forwardClassify each phrase based on whether it describes or gives an example of passive transport, facilitated diffusion, both processes, or neither.arrow_forward
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