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Bio 121 Chapter 6
| Question | Answer |
|---|---|
| Biofilm | irregular layer of microorganisms, embedded in the slime they secrete and concentrated at a solid of liquid surface |
| Calmodulin | a calcium binding protein, when bond, it alters the activity of certain enzymes or transport proteins |
| Cell Signaling | Mechnasims of communication between cells, when cells send a signal |
| Cryptochromes | a protein nucleous pigment that strongly absorbs blue light |
| Cyclic AMP (cAMP) | form of adenosine man phosphate in which the phosphate is part of a ring shaped structure (acts as a regulatory molecule) |
| Diacyglycerol | lipid consisting of glycerol combined chemically with two fatty acids, also called diglyceride |
| Endocrine | gland that secreted hormones directly into the blood or tissue fluid istead of into ducts |
| G Protein | group of proteins that bind GTP and are involved in the transfer of signals across the plasma membrane |
| GABA | (Gamma-Amino-Butyric-Acid) a neurotransmitter that has a inhibitory effect |
| Histamine | substance released from most cells that is involved in allergic and inflammatory reactions |
| Hormones | Chemical messenger produced in one region of body and transferred to another region, where it grows and developes |
| Inositol Triphosphate | second messenger that increases intracellular calcium concentration and activates enzymes |
| Integrins | receptor protein that binds to specific proteins in the extracellular matrix and to membrane proteins an adjacent cells |
| Kinase | enzyme that catalyzes the transfer of phosphate groups from ATP to acceptor molecules |
| Ligand | a molecule that binds to a specific site in a receptor or other protein |
| Neurons | a nerve cell, a conducting cell of the nervous system that typically consists of a cell body, dendrites and an axon |
| Neurotransmitters | a chemical signal used by neurons to transmit impulses across a synapse |
| Paracrine Regulation | regulation in which a signal molecule diffuses through interstitial fluid and acts on nearby target cells |
| Phytochrome's | blue-green pigment involved in a wide variety of physiological responses to light |
| Prostaglandins | group of local regulators derived from fatty acids, sometimes called local hormones |
| Receptor | molecule on the surface of a cell, or inside a cell, served as a recognized or biding site for signaling molecules |
| Receptor Down regulation | process by which hormones receptor decreases in number |
| Receptor Up Regulation | Process by which hormones receptor increase in numbers |
| Rhodopsin | visual purple, light sensitive pigment found in two rod cells of the vertebrate eye |
| Scaffolding Proteins | Proteins that organize groups of intracellular signaling molecules into signaling complexes |
| Second Messenger | a substance, cyclic AMP or calicum ions that relyas a messages from a hormone bond to a cell surface receptor, leads to change in cell |
| Signal Amplification | process by which a few signaling molecules can affect major responses in the cell |
| Signal tranduction | when cell conveys and amplifies an extracellular signal into a intracellular signal that affects some function in the cell |
| signaling molecule | local regulator or neurotransmitter that transmits info when it binds to a receptor on the cell surface or within the cell |
| Synapses | process of physical association of homologous chromosomes, during prophase 1 of meiosis |
| Transcription factors | DNA binding proteins that regulate transcription in Eukaryotes |
| Enzyme linked Receptors | Tyrosine kinases that phosphorylate the amino acid tyrosine in proteins |
| First Messenger | Signaling molecule |
| G Protein Linked receptor | activate g proteins that regulate many signal transduction pathways |
| Intracellular Receptors | receptors located inside the cell rather than on its cell membrane |
| Ion Channel linked receptors | cell surface receptor, convert signals into electrical signals |
| Ligand Gated channels | convert chemical signal into electrical signals, opens and closes in response to binding of the signal molecule (ligand) |
| MAP kinases | Proteins in the MAP pathway |
| Phosphatase | Enzyme that catalyzes the removal of a phosphate group by hydrolysis |
| Ras Proteins | Regulate signaling networks inside the cell. |