NURS 3110 Midterm: Exam 1 Study Questions
Document Summary
1. describe the function of the following bacterial/prokaryotic cell structures: capsule, cytoplasmic membrane, peptidoglycan layer, periplasmic space, fimbriae, glycocalyx, pili, flagella. (see microbiology, chapter 4, pp 91-94) Cytoplasmic membrane: selective permeability barrier that regulates the passage of substances into and out of the cell. Essential enzymes, carrier molecules receptors, proteins of chemotactic system. Peptidoglycan layer: part of cell wall; natural affinity towards water soluble. Small, bristle like fibers emerging from the surface of many bacterial cells. Develops as a coating of macromolecules to protect the cell and, in some cases, help it adhere to its environment. Pili: attachment to host and share dna code to allow for proliferation. Gram pos: does not have an outer membrane. Cytoplasmic membrane, thick peptidoglycan layer(responsible for retaining crystal violet dyes during staining), may have a capsule. Special components: teichoic acids(water soluble polymers and major surface antigens) and polysaccharides. Cytoplasmic/cell membrane, peptidoglycan endotoxins(lipopolysaccharides) layer, outer cell membrane,
