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Eukaryotic cells -ANSWERS-Consists of 3 general components: plasma membrane, cytoplasm
and intracellular organelles
Nucleolus -ANSWERS-Small, dense structure composed of RNA; most of the cellular DNA
Histones -ANSWERS-DNA-binding proteins that help compact and fold DNA into chromosomes
Passive Transport -ANSWERS-The movement of materials through a cell membrane without
using energy. Occurs by osmotic pressure.
Active Transport -ANSWERS-Energy-requiring process that moves large molecules across a cell
membrane
Transcription -ANSWERS-synthesis of an RNA molecule from a DNA template; results in
formation of mRNA
Translation -ANSWERS-Process by which mRNA directs the synthesis of a polypeptide
Nonsense Codons -ANSWERS-stop codons (UAA, UAG, UGA)
Complement System -ANSWERS-A group of blood proteins that directly lyse extracellular
pathogens
, membrane attack complex (MAC) -ANSWERS-complement system components assembled to
form pores in membranes of invading cells
classical pathway of complement system -ANSWERS-Activated by antigen-antibody complex
(adaptive immune system)
lectin pathway of complement system -ANSWERS-mannose-binding bacterial carbohydrates
binds to pathogen surface; second to act
Alternate pathway of complement system -ANSWERS-Activated by gram-neg bacterial and
fungal wall polysaccharides
Anaphylatoxins -ANSWERS-induce rapid degranulation of mast cells; necessary early in
inflammation and occurs CLOSE to inflammatory site
chemotactic factors -ANSWERS-attract phagocytes to area of inflammation; required for a much
longer period and occurs DISTAL to inflammatory site
hypertrophy -ANSWERS-Increase in cell size;
Results in enlarged tissue mass
Metaplasia -ANSWERS-Mature cell type is replaced by a less mature cell type
Dysplasia -ANSWERS-deranged cellular growth; atypical hyperplasia
Glycolysis -ANSWERS-the breakdown of glucose by enzymes, releasing energy and pyruvic acid.
Krebs Cycle (Citric Acid Cycle) -ANSWERS-Major end products are CO2 and two dinucleotides --
NADH and FADH2 -- which transfer their electrons into the electron-transport chain