Tonicity is the degree to which a particular cell is able to withstand changes in osmotic pressure. Cells that possess a cell wall are generally better equipped to tolerate these subtle changes and maintain their structural shape.

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Osmotic pressure is the pressure that occurs due to differences in the concentration of solutes on opposing sides of a semipermeable membrane. It can exert extreme stress on a cell when its external environment undergoes changes.

Osmotic Pressure

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

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Cell walls help to prevent cells from bursting in dilute environments, but they do not have many functions available to help maintain structure in high osmotic pressure environments, which results in plasmolysis. 

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