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This Concept Map, created with IHMC CmapTools, has information related to: External_Bacterial_Structures, Clockwise rotation results in a tumbling motion and changes the direction of bacterial movement. attractants and repellents When the bacterium is exposed to a chemical gradient of a repellent, it tumbles less frequently (has longer runs) as it moves down the gradient, but tumbles at the normal rate if it travels up the gradient. In this way, the net movement is towards a more optimum environment., flagella function, A basal body consisting of a rod and a series of rings that anchor the flagellum to the cell wall and the cytoplasmic membrane. function of basal body, Bacterial Structures External to the Cell Wall ????, chemical makeup Usually a viscous polysaccharide or polypeptide slime., role in body defense, structure and composition, An outer viscous covering of fibers extending from the bacterium. slime layer, in the body May resist unenhanced attachment by phagocytes., flagella flagellar arrangements lophotrichous: Two or more flagella at one or both poles., Bacterial Structures External to the Cell Wall ???? flagella, structure and composition Thin, protein tubes originating from the cytoplasmic membrane; found in virtually all gram-negative bacteria but not in many gram-positive bacteria., benefits of motility, taxis, rotation of flagella Clockwise rotation results in a tumbling motion and changes the direction of bacterial movement., benefits of motility Motility and chemotaxis probably help some intestinal pathogens to move through the mucous layer so they can attach to the epithelial cells o the mucous membranes. It also enable spirochetes to move through viscous environments and penetrate host cell membranes., benefit to bacteria in the body, An outer viscous covering of fibers extending from the bacterium. capsule, types short attachment pili (fimbriae), flagella structure and composition A basal body consisting of a rod and a series of rings that anchor the flagellum to the cell wall and the cytoplasmic membrane.
