FACTOID # 10: The total number of state executions in 2005 was 60: 19 in Texas and 41 elsewhere. The racial split was 19 Black and 41 White.
 
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Encyclopedia > Signal (biology)
It has been suggested that this article or section be merged with Electrophysiology. (Discuss)

In biology a signal or biopotential is an electric quantity (voltage or current or field strength), caused by chemical reactions of charged ions whose modulation represents coded information about the biological source from which it comes. Another use of the term lies in describing the transfer of information between and within cells, as in signal transduction. Biological signals can also be seen as an example of signal (information theory). Wikipedia does not have an article with this exact name. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Main articles: Life All organisms (viruses not included) consist of cells, which in turn, are based on a common carbon-based biochemistry. ... The article on electrical energy is located elsewhere. ... A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions. ... ... In biology, signal transduction is any process by which a cell converts one kind of signal or stimulus into another. ... In information theory, a signal is a flow of information. ...


This ionic transport within and along the excitable fibers (like nerve or muscle, including heart muscles) can be measured on the surface of the skin using a specific type of electrochemical sensor commonly referred to as the surface recording electrode (sometimes just called the electrode). A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin. ... A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...


The purpose of the electrode is to act as a transducer between the ionic transport of the cell and the electron flow in the connecting metal wire. It is the junction between the electrode and the electrolyte (paste or gel made up of silver-silver chloride) that allows such a transduction to take place. An electrode is a conductor used to make contact with a nonmetallic part of a circuit (e. ... A transducer is a device that converts one type of energy to another, or responds to a physical parameter. ...


The signals coming from the heart are called ECG waves, while that from the brain are called EEG waves. Similarly, from the muscles electromyogram, from the eyes electrooculogram, from retina electroretinogram, from the cerebral cortex electrocorticogram may also be recorded. ECG may also refer to the East Coast Greenway Lead II An Electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical voltage in the heart in the form of a continuous strip graph. ... Electroencephalography is the neurophysiologic measurement of the electrical activity of the brain by recording from electrodes placed on the scalp, or in the special cases on the cortex. ... Electromyography (EMG) is a medical technique for measuring muscle response to nervous stimulation. ... An electrooculogram (EOG) is a recording of the resting potential of the retina. ... Electroretinography, is used to measure the electrical responses of various cell types in the retina, including the light-sensitive cells (rods and cones) and the ganglion cells. ... Location of the Cerebral cortex Slice of the Cerebral cortex, ca. ...


These form intergral part of the armoury in electrophysiology studies and biofeedback experiments. This article needs to be cleaned up to conform to a higher standard of quality. ... This article needs to be cleaned up to conform to a higher standard of quality. ...


Also see


[[category:physiology] electromyography and myoelectric control A. Schematic of an electrophysiological recording of an action potential showing the various phases which occur as the wave passes a point on a cell membrane. ... Bioelectromagnetism (sometimes equated with bioelectricity) refers to the static voltage of biological cells and to the electric currents that flow in living tissues, such as nerves and muscles, as a result of action potentials. ... In biology, signal transduction is any process by which a cell converts one kind of signal or stimulus into another. ...


 
 

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