- published: 10 Mar 2015
- views: 580871
In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. Some authors generalize this concept to include the communication from a neuron to any other cell type, although such non-neuronal contacts may be referred to as junctions (a historically older term). Santiago Ramón y Cajal proposed that neurons are not continuous throughout the body, yet still communicate with each other, an idea known as the neuron doctrine.
The word "synapse" – from the Greek synapsis (συνάπσις), meaning "conjunction", in turn from συνάπτεὶν (συν ("together") and ἅπτειν ("to fasten")) – was introduced in 1897 by English physiologist Michael Foster at the suggestion of English classical scholar Arthur Woollgar Verrall.
Synapses are essential to neuronal function: neurons are cells that are specialized to pass signals to individual target cells, and synapses are the means by which they do so. At a synapse, the plasma membrane of the signal-passing neuron (the presynaptic neuron) comes into close apposition with the membrane of the target (postsynaptic) cell. Both the presynaptic and postsynaptic sites contain extensive arrays of molecular machinery that link the two membranes together and carry out the signaling process. In many synapses, the presynaptic part is located on an axon, but some postsynaptic sites are located on a dendrite or soma. Astrocytes also exchange information with the synaptic neurons, responding to synaptic activity and, in turn, regulating neurotransmission.
•••SUBBABLE MESSAGE••• TO: NerdFighteria FROM: Dave at DTXC.CO Cycling t-shirts at DTXC.CO. Don't give up the Road! DFTBA! *** Subbable Co-Sponsors: Logan Sanders https://www.facebook.com/perrylogans Dr. Boyev http://youtube.com/taichiknees *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content. *** We continue our tour of the nervous system with a look at synapses and the crazy stuff cocaine does to your body. -- Table of Contents: Electrical Synapses Use Ion Currents Over Gap Junctions to Transmit Neurological Signals 2:56 Chemical Synapses Turn Electrical Signals Into Chemica...
Synapse structure and functions in the nervous system.
Nach der Entstehung und Weiterleitung des Aktionspotentials, zeigen wir euch jetzt, wie die Reizübertragung an der Synapse funktioniert! Außerdem zeigen wir euch in dieser Playlist wie die Signale im Zellkörper verarbeitet werden, also unbedingt anschauen! :) Kategorie: Basics Hier kommst du direkt zum nächsten Video: http://bit.ly/DrogenWirkung » ALLE KANÄLE Wirtschaft: http://www.thesimpleeconomics.de Mathe: https://www.youtube.com/TheSimpleMaths Biologie: http://www.thesimplebiology.de Physik: http://www.thesimplephysics.de Chemie: http://www.thesimplechemics.de » MEHR VON UNS Twitter: http://www.twitter.com/thesimpleclub Facebook: http://fb.thesimpleclub.de Alex auf Instagram: http://alex.thesimpleclub.de Nico auf Instagram: http://nico.thesimpleclub.de » WAS IST THE SIMPLE CLU...
This is the final version of my animation, entitled Chemical Synapses. Enjoy! This animation was created using 3DS Max, ZBrush, CrazyBump, Adobe After Effects, Trapcode Particular, and the AE plug-in Camera Tracker, by the Foundry. Smoke brushes by frozenstocks, and soundtrack by Kevin MacLeod. Special thanks to Rima Gala for helping me out with the narration.
To purchase this program please visit http://www.greatpacificmedia.com/ Segment from the program The Nervous System: Neurons, Networks, and the Human Brain. Our Nervous System DVD begins by examining the structure and function of neurons; resting, action and post-synaptic potentials; and reflexes and neural networks. The peripheral, somatic, autonomic, sympathetic and parasympathetic nervous systems are introduced before looking at the central nervous system. After describing spinal cord structure and function the program then examines the human brain including the medula, pons, and cerebellum of the hindbrain; the recticular formation of the midbrain; and the thalamus, limbic system and cerebral cortex of the forebrain.
How one neuron can stimulate (or inhibit) another neuron at a chemical synapse More free lessons at: http://www.khanacademy.org/video?v=Tbq-KZaXiL4
http://www.anatomyzone.com Anatomy tutorial on the basic structure of the synapse. This video doesn't cover action potential generation or detailed mechanisms of neurotransmission - this will be covered in separate physiology videos. The structures we look at in this video are: - chemical synapse vs electrical synapse - axon - terminal bouton/synaptic bouton - voltage-gated calcium channels - synaptic vesicles - neurotransmitter, acetylcholine - exocytosis - presynaptic membrane, postsynaptic membrane - synaptic cleft - postsynaptic receptors - neuromuscular junction This video tutorial was created using images from our partners at OpenStax College, these images can be downloaded free from: http://cnx.org/contents/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@6.11 -------------------- Join th...
zAllex - Synapse [ Full Album 2013 ] Download: http://zallex.bandcamp.com/album/synapse 0:02 Dystopia 5:16 Timeless 9:56 Levitate 15:07 Refuge 18:26 Tamashi 23:55 Ascend 28:23 Firefly 33:30 Atlas 39:25 Sirens 43:57 Echoes 48:29 Shrine 51:53 Shade 55:02 Rain Thanks for listening and for your support! zAllex. https://www.facebook.com/zallex.raul.5
Oh synapse! Time to connect the dots…I mean neurons. Each neuron is separated from its neighbors, so how exactly does a message get passed from one neuron to the next? Through the synapse, of course! Take a closer look at the basic structure of the synapse, the two synapse types (electrical vs. chemical), and the different synapse receptors. Get the message? Good. Big thank you to Leo Torres for translating this video and providing us with Spanish subtitles. You can find him on Twitter at @leocogsci or on his blog at https://leocogsci.wordpress.com/ Neuro Transmissions is a channel on a mission to bring neuroscience to everyone. It's not rocket surgery, it's brain science! Learn all sorts of fun and interesting things with Alie Astrocyte every other Sunday by subscribing to the ch...
Neural synapse. Acetlycoline http://youtube.com/group/scienceeducation
Tomorrow is here
Damned by the speed of time
Imagine when becomes where did it go
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They shake hands and smile
I should introduce myself with a slap
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Half the truth enveloped in lies
Face life with a vengeance
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A nation of a million fools
Programmed by the media's mainline
And then a chilling thought to the point of madness
Left in a grip of terror
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With a gun to my head
In a grip of paranoia with a gun to my head
My spirit stands alone in a room