Concept explainers
To explain: The effect on functions of a cell if the plant cell wall or animal extracellular matrix were impermeable.
Concept introduction: Plant cell wall is situated outside the cell membrane. It differentiates the animal cell from the plant cell. Plant cell wall is composed of cellulose but the exact chemical composition varies from species to species. Cells in plant and animal are organized into tissues. Neighboring cells are connected with plasmodesmata in plant and gap junctions in animal. Animal cells have extracellular matrix that include collagen, fibronectin, and proteoglycans. It forms a network of molecular fibers. It forms cytoplasmic channels which is continuous with cytoplasm of the neighboring cells. It allows the passage of ions, amino acids, sugar molecules and various molecules. It is helpful in maintaining cell to cell environment and work together in harmony.
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Campbell Biology (10th Edition)
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- Watch this video (http://openstaxcollege.org/l/endomembrane1) to learn about the endomembrane system, which includes the rough and smooth ER and the Golgi body as well as lysosomes and vesicles. What is the primary role of the endomembrane system?arrow_forwardThe freeze-fracture technique demonstrated: a. that the plasma membrane is a bilayer with individual proteins suspended in it. b. that the plasma membrane is fluid. c. that the arrangement of membrane lipids and proteins is symmetric. d. that proteins are bound to the cytoplasmic side but not embedded in the lipid bilayer. e. the direction of movement of solutes through the membrane.arrow_forward. what are two structural characteristics of cell membrane determine whether substances can pass through them passively? What determines whether or not a substance can be actively transported through the membrane?arrow_forward
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