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23 Cards in this Set
- Front
- Back
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Cell Wall of Plants |
Protects Plants Maintain its Shapes Prevents excessive uptake of water Made of cellulose fibers embedded in other polysaccharides and protein |
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Animal Cells |
Lack cell walls but have extracellular matrix |
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Plasma Membrane |
boundary that separates the living cell from its surrounding |
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Selective Permeability |
Plasma membrane allows some substance to cross it more easily than others |
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Fluid Mosaic Model |
States that a membrane is a fluid structure with a mosaic of various proteins embedded in it |
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Cytoskeleton |
Network of fibers extending through the cytoplasm |
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ECM |
Found in Animal Cells Stands for Extracellular Matrix Functions: Support, Adhesion, Movement and Regulation |
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ECM Proteins |
Bind to receptor proteins in plasma membrane call integrins |
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ECM made of |
Glycoproteins such as collagen, proteoglycans, and fibronectin |
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Cytoskeleton Roles |
Support and Motility Help support the cell and maintain its shape Interact with motor proteins Is inside cell Vesicles can travel along monorails by cytoskeleton Recent evidence: cytoskeleton may help regulate biochemical activities
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Cell Junctions |
Neighboring cells in tissues, organs, or organ systems intact and communicate through direct physical contact Intercellurar junction facilitate this contact |
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Cytoskeleton |
organize the cells structures and activities anchoring many organelles |
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Desmosomes |
Anchoring junction that fasten cells together into strong sheets |
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Gap junctions |
Communication junction that provides cytoplasmic channels between adjacent cells |
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Tight Junctions |
Membranes of neighboring cells are pressed together preventing leakage of extracellular fluid Prevent fluid from moving across a layer of cells |
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Types od Intercellular Junctions |
Plasmodesmata- only found in plants Animal Junctions: Tight, Gap, Desmosomes |
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Cytoskeleton |
Network of fibers that organizes structures and activities in the cell |
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Cell Wall |
Extracellular structure that distinguished plant cells from animal cells |
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What has cell walls |
Prokaryotes Fungi Some Protist |
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Extracellular Structure Include |
Cell wall of plants Extracellular matrix (ECM of animal cells) Intracellular Junctions |
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Most cells synthesize and secrete materials that are external to plasma membrane |
N/A |
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Cytoskeleton 3 Types of Molecular Structures |
Microtubules: Thickest of the 3 Microfilaments: also called actin/thinnest Intermediate Filaments: fibers with diameters in a middle range
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N/A |
N/A |
