Concept explainers
To write:
Both the small water-soluble substances and highly lipid-soluble substances of any size possess the tendency to permeate through the plasma membrane without any help.
Introduction:
Any substance that passes between cells and the enveloping extracellular fluid must possess the tendency to pass through the plasma membrane. If a component can pass through the membrane, the membrane is considered permeable for that component. However, in case if the component cannot pass, then the membrane is considered impermeable to it. The plasma membrane possesses the tendency of selective permeability, that is, it allows some of the particles to go through while inhibiting the others.
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Chapter 3 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
- Explain how the chemical composition/structure of the plasma membrane allows for it to be selectively permeable. What does this information tell you about the chemical composition of an integral protein versus a peripheral protein? How do these differences allow for their different functions?arrow_forwardExplain why the plasma membrane exhibits selectivepermeability.arrow_forwardDefine cell membrane transport and membrane selectivity. Explain why the plasma membrane is selectively permeable. List and discuss which molecules can and cannot cross the membrane and explain why. Discuss why some molecules can cross directly while others require transport proteins.arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning