PPT-Membrane Potentials and Impulses

How signals are sent through the nervous system Synapse Synapse Junction between two connecting neurons Synaptic cleftbetween the neurons signal has to go across this space Signals need to be sent . Simulation. Aidan Thompson. , Stephen . Foiles. , Peter Schultz, . Laura . Swiler. , Christian . Trott. , . Garritt. Tucker. Sandia National Laboratories. SAND . Numbers: . 2013-2093C, 2013-4097P. Moore’s Law for Interatomic Potentials. . By Dr. . Vani. Gupta. 2. “Polarity” . of the . membrane. Na. +. K. +. Mg. 2+. Ca. 2+. H. +. HCO. 3. -. Cl. -. SO. 4. 2-. PO. 3. -. protein. inside. (in mM). 14. 140. 0.5. 10. -4. (pH 7.2). 10. Stimulus and Response. Membrane Model. The dc generator is very low capacity.. What does this means (structurally)?. Membrane Components. Action Potentials. Active Responses. APs at Above Threshold Stimuli. In the CNS:. Neuroglia. In the PNS:. Neuroglia. Myelination. is the process of forming a myelin sheath. which . insulates and increases nerve impulse speed. .. It is formed by. Oligodendrocytes . in the CNS and by . بسم الله الرحمن الرحيم. Objectives . Define graded potential and action potential.. Describe characteristics of graded potential. C. ompare . between the different phases of excitability during a nerve action . and Synapses. Brain and Behavior. David Eagleman. Jonathan . Downar. Chapter Outline. The Cells of the Brain. Synaptic Transmission: Chemical Signaling in the Brain. Spikes: Electrical Signaling in the Brain. in Austria. 02 June 2015 // Gerald Kalt. Biomass Policies . workshop: . Lessons . learned and policy challenges . in a mature bioenergy . market. , . Vienna, 2 June 2015. Comparison. . with. . current. with emphasis on nerve action. Mike Clark, M.D.. Principles of Electricity . Opposite charges attract each other. Energy is required to separate opposite charges across a membrane. Energy is liberated when the charges move toward one another. OBJECTIVES. Define. . the action potential.. Describe. the . changes. . during action potential.. Discuss . conduction. (propagation) of action potential. Describe . recording . of . monophasic. Miss Tagore. Year 13 Biology. Lesson Starter. In the resting phase of an action potential, what type of protein in the cell membrane is active?. The sodium potassium pump.. (Sodium channels are closed as are the majority of potassium channels). HONORS ANATOMY & PHYSIOLOGY. Key terms. action potential. : A short-term change in the electrical potential that travels along a cell (such as a nerve or muscle fiber); the basis of neural communication. is. afferent neuron.. (b) Receptor . regulates. afferent neuron.. To CNS. Afferent. neuron. Afferent. neuron. To CNS. Receptor. protein. Sensory. receptor. Stimulus. Neurotransmitter. Sensory. receptor. Resting Membrane Conditions. What is the resting state of a neuron?. When the nerve cell is . not conducting. an impulse it is in resting state. . This makes the membrane of the axon permeable of K. ACTION POTENTIALS. MEMBRANE POTENTIAL. Electrical potential exists across the cell membrane. This potential could be changed in two directions. Made more positive - depolarization. Made more negative – hyper polarization.