Lysis refers to the bursting of a cell in a hypotonic environment. Cells that lack a cell wall are highly prone to lysis as water moves into them. In contrast, the presence of a cell wall allows a cell to maintain its shape and integrity for a longer time before eventually lysing.

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A hypotonic solution has a lower solute concentration than another solution, such as the interior of a cell, causing water particles to move into the cell via osmosis. For example, if a cell with $${}20\%$$ solute and $${}80\%$$ water is placed in a beaker containing $${}10\%$$ solute and $${}90\%$$ water, water will enter the cell, causing it to swell and potentially lyse, or burst.

Hypotonic Medium

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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.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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