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Bio 121 Chapter 6

QuestionAnswer
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.
Created by: adhami1
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