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Unit 8 AP Biology Cell signaling Flashcards

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6221095788Short Distance SignalingMessenger molecules are involved in local signaling that travel only short distances0
6221095789Synaptic SignalingA nerve cell releases neurotransmitter molecules into a gap between cells, stimulating the target cell1
6221095790Endocrine Signalingcells secrete hormones, which travel via the circulatory system to other parts of the body, where they reach target cells2
6221095791ReceptionThe target cell's detection of a signaling molecule coming from outside the cell; involves the binding of the signaling molecule to a receptor protein3
6221095792TransductionA step or series of steps that converts the signal to a form that can bring about a specific cellular response4
6221095793Signal Transduction PathwayA sequence of changes in a series of different molecules during transduction5
6221095794ResponseThe transduced signal triggers a specific change in cellular activity6
6221095795LigandA molecule that specifically binds to a receptor based on complementary shape and causes a change in shape of the receptor7
6221095796Examples of Transmembrane ReceptorsG protein-coupled receptors and ligand-gated ion channels8
6221095797Ligand-gated Ion ChannelA membrane receptor that has a region that can act as a "gate" for ions when the receptor assumes a certain shape9
6221095798TestosteroneA steroid hormone that passes through the cell membrane and binds to a receptor within the cytoplasm and turns on specific genes that control male sex characteristics10
6221095799Transcription FactorSpecial proteins that control which genes are turned on (transcribed into mRNA) in a particular cell at a particular time11
6221095800Protein KinasesEnzymes involved in phosphorylation cascades that transfer phosphate groups from ATP to other proteins; addition of phosphates activates the protein12
6221095801Second MessengersSmall, nonprotein water-soluble molecules or ions involved in a signaling pathway; examples include cAMP and calcium ions13
6221095802cAMPCyclic AMP; a second messenger that is activated by adenylyl cyclase14
6221095804DiabetesThe ligand insulin is not produced (Type 1) or the insulin receptor does not bind to the ligand (Type 2)15
6221095805AcetylcholineNeurotransmitter that produces an impulse in a muscle cell16
6221095808EpinephrineAn example of a chemical messenger (ligand) that binds to a transmembrane receptor (GPCR) and signals the breakdown of glycogen into glucose17
6221095809direct contact signalingDirect signaling can occur by transferring signaling molecules across gap junctions or plasmodesmata between neighboring cells18
6221095810neurotransmitterChemical messengers that cross the synaptic gaps between neurons.19
6221095811glycogenAn extensively branched glucose storage polysaccharide found in the liver and muscle of animals; the animal equivalent of starch.20
6221095812glucagonA protein hormone secreted by pancreatic endocrine cells that raises blood glucose levels; an antagonistic hormone to insulin.21
6221095813insulinA protein hormone synthesized in the pancreas that regulates blood sugar levels by facilitating the uptake of glucose into tissues22
6221095814amplificationThe strengthening of stimulus energy during transduction.23

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