- published: 11 Feb 2010
- views: 805123
A neuron (/ˈnjʊərɒn/ NYEWR-on or /ˈnʊərɒn/ NEWR-on; also known as a neurone or nerve cell) is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. Neurons can connect to each other to form neural networks. Neurons are the core components of the brain and spinal cord of the central nervous system (CNS), and of the ganglia of the peripheral nervous system (PNS). Specialized types of neurons include: sensory neurons which respond to touch, sound, light and all other stimuli affecting the cells of the sensory organs that then send signals to the spinal cord and brain, motor neurons that receive signals from the brain and spinal cord to cause muscle contractions and affect glandular outputs, and interneurons which connect neurons to other neurons within the same region of the brain, or spinal cord in neural networks.
Crash Course (also known as Driving Academy) is a 1988 made for television teen film directed by Oz Scott.
Crash Course centers on a group of high schoolers in a driver’s education class; many for the second or third time. The recently divorced teacher, super-passive Larry Pearl, is on thin ice with the football fanatic principal, Principal Paulson, who is being pressured by the district superintendent to raise driver’s education completion rates or lose his coveted football program. With this in mind, Principal Paulson and his assistant, with a secret desire for his job, Abner Frasier, hire an outside driver’s education instructor with a very tough reputation, Edna Savage, aka E.W. Savage, who quickly takes control of the class.
The plot focuses mostly on the students and their interactions with their teachers and each other. In the beginning, Rico is the loner with just a few friends, Chadley is the bookish nerd with few friends who longs to be cool and also longs to be a part of Vanessa’s life who is the young, friendly and attractive girl who had to fake her mother’s signature on her driver’s education permission slip. Kichi is the hip-hop Asian kid who often raps what he has to say and constantly flirts with Maria, the rich foreign girl who thinks that the right-of-way on the roadways always goes to (insert awesomely fake foreign Latino accent) “my father’s limo”. Finally you have stereotypical football meathead J.J., who needs to pass his English exam to keep his eligibility and constantly asks out and gets rejected by Alice, the tomboy whose father owns “Santini & Son” Concrete Company. Alice is portrayed as being the “son” her father wanted.
The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain; diffuse or localised nerve nets are present instead. The brain is located in the head, usually close to the primary sensory organs for such senses as vision, hearing, balance, taste, and smell. The brain is the most complex organ in a vertebrate's body. In a typical human, the cerebral cortex (the largest part) is estimated to contain 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.
Physiologically, the function of the brain is to exert centralized control over the other organs of the body. The brain acts on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information integrating capabilities of a centralized brain.
The nervous system is the part of an animal's body that coordinates its voluntary and involuntary actions and transmits signals to and from different parts of its body. Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. In vertebrate species it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body. Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent. Most nerves serve both functions and are called mixed nerves. The PNS is divided into a) somatic and b) autonomic nervous system, and c) the enteric nervous system. Somatic nerves mediate voluntary movement. The autonomic nervous system is further subdivided into the sympathetic and the parasympathetic nervous systems. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The enteric nervous system functions to control the gastrointestinal system. Both autonomic and enteric nervous systems function involuntarily. Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves.
Introduction to the neuron and its anatomy More free lessons at: http://www.khanacademy.org/video?v=ob5U8zPbAX4
Neurons or nerve cells - Structure and function | Human Anatomy | Biology The nervous system is an essential part of the human body that helps in the transmission of signals across the various parts of the body, that is, it releases messages back and forth from the brain to the different parts of the body, and also helps in the coordination of voluntary and involuntary actions of the body. At the cellular level, the nervous system consists of a special type of cell, called the neuron, also known as a "nerve cell". The neurons connect to each other using a synapse (which is a structure that acts like a pathway connection that transmits the signals to the other cells) to form the nervous system. Neurons have special structures that allow them to send signals rapidly and precisely to other...
In my 2-Minute Neuroscience videos I simplistically explain neuroscience topics in 2 minutes or less. In this video, I discuss the neuron, briefly touching on all of the parts of a neuron including the dendrites, soma, axon hillock, axon, and axon terminals or synaptic boutons. I describe how a signal travels from the dendrites of a neuron, down the axon, and to the axon terminals to communicate with another neuron through the release of neurotransmitter. For more neuroscience articles, videos, and a complete neuroscience glossary, check out my website at www.neuroscientificallychallenged.com ! The image of a brain used in this video is a CC image courtesy of _DJ_ on Flickr. The work can be seen here: https://flic.kr/p/dLbzPm and the CC license can be seen here: https://creativecommons.o...
•••SUBBABLE MESSAGE••• TO: Kerry FROM: Cale I love you with all my ha-art. Deadset. *** 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. *** Today Hank kicks off our look around MISSION CONTROL: your nervous system. -- Table of Contents: Sensory Input, Integration and Motor Output 1:36 Organization of Central and Peripheral Systems 2:16 Glial Cells 3:54 Role, Anatomy and Function of Neuron Types 5:23 Structure and Function of Neurons 6:20 -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter....
You will learn about "Structure of a Neuron" in this video. Neurons also known as the nerve cells are the basic building blocks of the nervous system that help in receiving, processing and transmitting information. A neuron consists of 3 main components, i.e. the cell body or soma, dendrites and the axon. The cell body consists of the cytoplasm and the nucleus. Long thin fibres called nerve fibres stretch out of the cell body. The shorter fibres on the cell body are called dendrites. Axon is the longest fibre of a neuron. It has an insulating and protective sheath called the myelin sheath, which is made up of fats and proteins. The neurons carry messages in the form of electrical signals called nerve impulses. The dendrites pick up impulses from receptors, pass it to the cell body and the...
TWITTER: https://www.twitter.com/Darehl How Neurons Work Made Simple - An Animated Guide This video series is presented for educational and enlightenment purposes only. The series was created by the Cassiopeia Project. The Cassiopeia Project - making science simple! The Cassiopeia Project is an effort to make high quality science videos available to everyone. If you can visualize it, then understanding is not far behind. For more information visit: http://www.cassiopeiaproject.com ✔What Is a Neuron? http://psychology.about.com/od/biopsychology/f/neuron01.htm ✔Neurons that fire together wire together! http://www.drdomm.com/neurons-the-fire-together-wire-together/ ✔How Nerves Work http://science.howstuffworks.com/life/human-biology/nerve5.htm ✔The first real-time, non-invasive imagin...
Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-3a36 Support CrashCourse on Subbable: http://subbable.com/crashcourse
http://www.Athenism.net / download it in 720p, 1080p and iPhone formats at http://bit.ly/g2mLL8 Twitter: http://twitter.com/ipowerproject Facebook: http://www.facebook.com/pages/Athenism/126607000711913 Reese on Twitter: http://www.twitter.com/Reese015 Full soundtrack at http://www.ProfessorKliq.com (who did the amazing original soundtrack) Related links that can help in understanding God is in The Neurons: (Neuroscience related:) YouTube - Part 4 - Phantoms In The Brain (Episode 1) http://www.youtube.com/watch?v=_1RPkp7rdnw#t=2m30s YouTube - Part 5 - Phantoms In The Brain (Episode 1) http://www.youtube.com/watch?v=F0R0OCurkLM#t=3m36s Where is consciousness? http://discovermagazine.com/video/unlocking-secrets-power-of-brain-nsf Joseph M. Carver, Ph.D. - Norepinephrine: From Arousal to ...
Directed by @tiffanyshlain "BRAIN POWER: From Neurons to Networks" is the third cloud film in the "Let it Ripple: Mobile Films for Global Change" series. All films in the series are available for free customization for any nonprofit organization working to make a difference in the world. To request a free customized version of this film please write to jesse@letitripple.org or visit www.letitripple.org for more information. Check out the #TEDBook that accompanies this film. Info at: http://www.letitripple.org Special thanks to Tim Delaughter, Dominic Griffin and The Polyphonic Spree for donating their song "It's the Sun" and to Moby for donating his song "Wait for Me." **All music rights secured for "It's the Sun" by Tim Delaughter and Dominic Griffin.** **All music rights secured ...
(with edited captions)
You don't have to run away
You can find a way to solve your problems
Just don't lose control
If everyone complains about you all the time
Don't be afraid of them or they could steal your mind
A thousand times you heard
"You'll never hit a home run"
Those assholes will keep pickin' on me 'till appears the sun
That's enough for you but not enough for them
This nightmare's gonna start again and again
(Don't)
No don't let 'em get inside your head
Your dreams and your life could be wrecked in a second
(Don't)
Don't let this pain dominate your brain
You can find a way to keep your head at the right place
Everything went wrong
Part of your life you were all alone
Listening to people always telling you what to do
You gotta move on but you're so confused
You have nothing to lose
(Don't)
No don't let 'em get inside your head
Your dreams and your life could be wrecked in a second
(Don't)
Don't let this pain dominate your brain