Answered: Describe the fluid-mosaic model of the…

Describe the fluid-mosaic model of the cell membrane and how it results in a semi-permeable membrane (and what that means)

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 1RQ: Describe the general functions of the following in a eukaryotic cell: the plasma membrane,...

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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.

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Describe the fluid-mosaic model of the cell membrane and how it results in a semi-permeable membrane (and what that means)

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Describe the general functions of the following in a eukaryotic cell: the plasma membrane, cytoplasm, DNA, ribosomes, organelles, and cytoskeleton.
Why is it advantageous for the cell membrane to be fluid in nature?
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Why is the current model of Plasma membrane known as the “Fluid Mosaic Model”? Whatis the fluid, and in what sense is it fluid? What makes up the mosaic?
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Describe the general structure of all cell membranes. How does this membrane structure determine the selective permeability of what can pass across the membrane. Then describe 3 ways cell membranes will differ from one another.
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