week 2 notes
Popular in Intro to Neuroscience
Popular in Neuroscience
This 2 page Class Notes was uploaded by Affra Mohamed on Tuesday September 8, 2015. The Class Notes belongs to 2000 at Georgia State University taught by in Summer 2015. Since its upload, it has received 38 views. For similar materials see Intro to Neuroscience in Neuroscience at Georgia State University.
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Date Created: 09/08/15
Neuroscience week 2 notes Left and right side brain theory proven not true Neurobiology The cells of the nervous system neurons and glia Neurons microscopic can work by themselves Cells tissue organ organ systems Liver cells release proteins to eat up toxins Neurons information move around the body Certain neurons dictate stimuli Glia wrapping around the axon Mylain fatty substance inside the swachann and serves as an insulator Astrocyte glia cell whos ends attach to the capillaries they make sure neurons have blood ow If it needs more neuron activity it dilates capillaries to increase neuron activity by increasing blood ow to neuron Nodes of Ranvia the electrical signals jump from glia to glia so don39t have to stop at axon 4 different types of glia Microglia part of immune cells that eat up extra bad things if repair they show up to clear that place Blood brain barrier a evolution harmful things in plants and animals cant get into our brain Oligodendrocytes same as schwann cell which is found in the central nervous system the brain and their feet stick on different axons The central nervous system the brain Schwann cells are found in the peripheral nervous system or outside the brain Mylin speeds up signal sent Neurotransmitters release them so they can attach to other neurons so they can feel pain When neuron receives muscle signals muscle contracts automatic response foot lifts up Perception perceiving it what it is Sensation feeling it feel pain Thermal pain going to have specialized neurons certain ones dedicated to feeling heat and cold which differs from neurons that are dedicated to feeling pain Certain neurons have specialized functions Central nervous system brain and spinal cord Peripheral nervous system neurons around the body Monopolar unipolar sensory neurons touch temp and pain lnterpolar bipolar neuron one neurite on either side Multipolar muscular processes Neuron signal action potential When the neuron was doing nothing always negatively charged particles in the neuron Sodium and potassium are neurotransmitters NaCI ionic bond when place it in H20 dissolves and leaves ions behind and H20 breaks ionic bonds Negative potassium ions on the neuron Cell membrane doesn39t let the positive particles to go into the neuron and if we let the positive Na particle to go into it it will become very positive Action potential can be done arti cially Naturally proteins on the cell membrane only opens through force and when it does Na ion ows into the cell Protein channel voltage gated when we hit 40 then the channels open and the Na runs in Refractory electricity running through the neuron Many ways to get that neurotransmitter into the cell stimuli that excites the neuron which causes action potential going from 65 to 40