Chapter+9_cell-communication notes - BIOLOGY 325: Inquiries...

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BIOLOGY 325: Inquiries in Biological ScienceChapter 9 Notes
Boundless.com/biologyCellCommunicationSignaling Molecules and Cellular ReceptorsPropagation of the SignalResponse to the SignalSignaling in Single-Celled OrganismsFree to share, print, make copies and changes. Get yours at
IntroductionForms of SignalingTypes of ReceptorsSignaling MoleculesSignaling Molecules and Cellular ReceptorsCell Communication > Signaling Molecules and Cellular ReceptorsFree to share, print, make copies and changes. Get yours at
The ability of cells to communicate through chemical signals originated in singlecells and was essential for the evolution of multicellular organisms.In multicellular organisms, cells send and receive chemical messages constantlyto coordinate the actions of distant organs, tissues, and cells.Cells can receive a message, transfer the information across the plasmamembrane, and then produce changes within the cell in response to themessage.Single-celled organisms, like yeast and bacteria, communicate with each other toaid in mating and coordination.Cellular communication has developed as a means to communicate with theenvironment, produce biological changes, and, if necessary, ensure survival.IntroductionFree to share, print, make copies and changes. Get yours at on-379-11605Communication is KeyView on Boundless.comCell Communication > Signaling Molecules and Cellular Receptors
Cells communicate via various types of signaling that allow chemicals to travel totarget sites in order to elicit a response.Paracrine signaling occurs between local cells where the signals elicit quickresponses and last only a short amount of time due to the degradation of theparacrine ligands.Endocrine signaling occurs between distant cells and is mediated by hormonesreleased from specific endocrine cells that travel to target cells, producing aslower, long-lasting response.Autocrine signals are produced by signaling cells that can also bind to the ligandthat is released, which means the signaling cell and the target cell can be thesame or a similar cell.Direct signaling can occur by transferring signaling molecules across gapjunctions between neighboring cells.Forms of SignalingFree to share, print, make copies and changes. Get yours at ignaling-380-11606Forms of Chemical SignalingView on Boundless.comCell Communication > Signaling Molecules and Cellular Receptors

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