Answered: Which component of the plasma membrane…

Which component of the plasma membrane is primarily responsible for forming a physical barrier between the cell’s internal and external environments?

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter2: Cell Physiology

Section: Chapter Questions

Problem 1RE

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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 component of the plasma membrane is primarily responsible for forming a physical barrier between the cell’s internal and external environments?

Expert Solution

Step 1 Introduction

The cell is the basic structural and functional unit of our body. It carries out many functions in our body. The cells are basically of two types-prokaryotic and eukaryotic. Prokaryotic cells are the primitive types of the cell and do not have a nucleus and membrane or membrane-bound organelles. Eukaryotic cells have a nucleus and membrane or membrane-bound organelles.

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