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absite cell biol

QuestionAnswer
what causes cells to be negative inside relative to outside Na/K ATPase (3 out and K in)
what are tight jxns cell-cell occluding to form impermeable barrier (ie epithelium)
what are gap jxns communication bw cells, subunit is connexins
what is the ABO Ag glycolipid on cell membrane
what is the HLA Ag glycoprotein on cell membrane
what is G1, S part of cell cycle protein synthesis, chromosomal duplication
what is G2, M part of cell cycle mitosis, nucleus divides
what part of cell cycle determines cell cycle length G1, that is most variable
what part of cell cycle do growth factors affect G1
what part of cell cycle then turns to quiescence G1 goes to G0
what happens in prophase centromere attach, spindle formation, nucleus disappears
what happens in metaphse chromosome alignment
name stages of mitosis prophase, metaphase, anaphase, telophase
what happens in anaphase chromosomes pull apart
what happens in telophase separate nucleus reform around ea set of chromosome
what are parts of nucleus membrane dbl membrane, outer contains ER
what is nucleolus, what happens there inside the nucleus, no membrane, ribosomes made here
how do steroid hormones work bind receptors in cytoplasm, then enters nucleus and acts as t-factor
how do thyroid hormones work bind receptor in nucleus, then acts as t-factor
what do initiation factors bind RNA polymerase
purines incl guanine and adenine
pyrimidines include cytosine, thymidine (only in DNA), uracil (only in RNA)
name steps of translation tRNA-peptide complex comes to A site on ribosome, bond is made w forming chain on P site and empty tRNA released
where does krebs cycle occur inner membrane of mitochondria
how many ATP goes 1glu make via glycolysis 2 ATP, 2 pyruvate
how many ATP created from Krebs cycle 36
describe steps of Krebs cycle 1glu goes to 2 pyruvate, creates NADH and FADH2->acetyl coA enters electron transport chain and creates 36 ATP
what happens in gluconeogenesis lactic acid and aa are converted to glu [ie glycolysis in reverse, Cori cycle in liver takes lactic acid from mscl]
rough ER creates, incrsd in what cell types exported proteins (ie pancreatic acinar cells)
smooth ER creates, increased in what cell types lipid/steroid synthesis, detoxifies drugs (incrsd in liver and adrenal cortex)
what happens in golgi apparatus modifies proteins w carb, proteins then transported to cell membrane and are either secreted or targeted to lysosomes
role of lysosomes digestive enzymes that degrade engulfed particles and wornout organelles
role of phagosomes engulf large particles that fuse w lysosomes
role of endosomes engulf small particles that fuse w lysosomes
prot K C is activated by what activated by Ca and diacylglycerol
Prot Kinase A is activated by what cAMP, then phosphorylates other enzymes and proteins
name 3 intermediate filaments and the cell types keratin (hair/nails), desmin (mscl), vimentin (fibroblasts)
roles of microtubules form cilia, neuronal axons, mitotic spindles and involved in transport of organelles inside cell
what's centriole specialized microtubule involved in cell division, forms spindle fibers which pull chromosomes apart
Created by: ehstephns on 2013-01-21



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