Answered: Which of the following statements is…

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Biology

Which of the following statements is CORRECT in describing the nature of water channels?

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter3: Cells And How They Work

Section: Chapter Questions

Problem 5SQ: The passive movement of a solute through a membrane protein down its concentration gradient is an...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

Which of the following statements is CORRECT in describing the nature of water channels?

Group of answer choices

It is a channel for the transport of any liquid medium.

It is a non-gated channel.

It is a channel that can facilitate the transport of sodium ions.

It is a channel for active transport.

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The passive movement of a solute through a membrane protein down its concentration gradient is an example of _________. a. osmosis b. active transport c. endocytosis d. diffusion
Which of the following involves movement from an area of high concentration to an area of lower concentration simple diffusion facilitated passive transport both simple diffussion and facilitated passive transport active transport
Which of the following is/are associated with passive (facilitated) transport? Aquaporin Sodium-Potassium pump Voltage-gated K+ channel Glucose carrier protein Ligand-gated Na+ channel
Which 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 transport
The movement of water through a semipermeable membrane toward solutes is called diffusion. A. True B. False
Which of the following transport proteins generates potential energy that can be used for the transport of unrelated compounds by other transport proteins? K ion channels Na ion channels Na/K ATPase Aquaporins
Which of the following molecules can bind to and open at least one type of Kir channel? ATP PIP2 EDTA All of the above
Which 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 membrane
Which of the following best describes diffusion (passive transport)? Group of answer choices: Net movement of molecules from an area of low concentration to an area of high concentration. Net movement of fluids from the environment into and out of an organism. Net movement of molecules from an area of high concentration to an area of low concentration. Net movement of molecules between cells.
The movement of water is called osmosis. Osmosis is the diffusion of water, and it too moves to reach equilibrium. The relationship between solute concentration and water are opposite. An area with high concentration of solute has less water "concentration", and an area of low solute concentration has a higher water "concentration". Select the options that describe the movement of water if there is a gradient across a membrane. Hint: There are two correct answers. One with the solute perspective and one with a water perspective. Select all that apply: Water moves from an area of high solute concentration to an area of low solute concentration. Water moves from an area of low solute concentration to an area of high solute concentration. Water moves from an area of high water "concentration" to an area of low water "concentration". Water moves from an area of low water "concentration" to an area of high water "concentration".
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Consider the two solutions separated by an ideal semipermeable membrane (permeable to water but impermeable to solute). Assuming complete dissociation of all the salts you can expect: a.) net water movement from side 1 to side 2 b.) net water movement from side 2 to side 1 c.) no net water movement