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NSG 5003 Midterm Exam Study Guide Latest
Midterm Exam Study Guide
Cell Biology
Describe the structure (lipid bilayer), composition, and function of the plasma membrane.Structure: lipid bilayer. amphipathic. Hydrophilic and hydrophobic regionsComposition: lipds, carbohydrates and proteinFunction: control composition of the space or compartment they enclose, enclose the cell,provide selective transport system, provide cell to cell recognition, provides cellularmobility and shapeCompartmentalization, Scaffold for biochemical activities, Providing aselectively permeable barrier, Transporting solutes, SignalTransduction, Intercellular interaction, Energy transduction
Recognize the consequences of lysosomal enzyme leakage.Enzymatic digestion of the nucleus and nucleolus occurs, halting DNAsynthesis.Autodigestion ->cellular injury- > cell death
Understand the action of neurotransmittersReceive and transmit electrical impulses very rapidly across junctions called synapses
Recognize the effects of age on lymphocyte functiona decrease of the lymphocyte functional response to mitogens with aging(immunodepression)
Describe DNA synthesisDuring replication, these strands are separated. Each strand of the original DNA moleculethen serves as a template for the production of its counterpart, a process referred to assemiconservative replication. Cellularproofreadingand error-checking mechanismsensure near perfect fidelity for DNA replication.DNA polymerasesynthesizes the newstrands by addingnucleotidesthat complement each (template) strand. DNA replicationoccurs during the S-stage ofinterphase. DNA polymerase has 5′-3′ activity.DNA isalways synthesized in the 5′ to 3′ direction
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