PPT-RESTING MEMBRANE POTENTIAL

By Dr Ayisha Qureshi Assistant Professor Physiology MBBS MPhil OBJECTIVES By the end of this lecture you should be able to Define Nernst potential Use the Nernst equation to calculate the values of Nernst potential for Na K amp Cl. 2nd. practice. Medical Informatics. Biomedical Signal Processing. TAMUS, Zoltán Ádám. zoltanadam_tamus@yahoo.com. Examples of Biomedical Signals. Action potential. Electroneurogram (ENG). Electromyogram (EMG). . 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. April . 9, . 2014.. N. ervous . system and biological . electricity II. 1. P. re. -lecture quiz. 2. . A review of resting potential and Nernst equation. 3. . Goldman equation. 4. . Action potential. بسم الله الرحمن الرحيم. Objectives. Define Membrane . Potential. ?. Describe the electrical potential across the cell membrane.. Explain the Resting . Membrane and its cause . (Concentration . and . Resting Membrane Potential. Part 2. . . Action potential. Action Potential . An . action potential. can be thought of as the “firing” of the neuron.. Action potentials will . propagate . down the length of a neuron’s axon. David Taylor. dcmt@liv.ac.uk. http://www.liv.ac.uk/~dcmt. When you have worked through this you should be able to . Remember the . function of the cell membrane and definition of membrane potential . 6.5 Nerves, Hormones, and Homeostasis. How do neurons communicate and relay information?. http://www.pennmedicine.org/encyclopedia/em_DisplayAnimation.aspx?gcid=000089&ptid=17. Action Potential. ~1900 Julius Berstein suggested that nerve impulses were an electrochemical message created by the movement of ions through the nerve cell membrane.. . 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. action . potential. Prepare: . Bring voltmeter and batteries. Nice 3D visualization of neurons: . https://youtu.be/Zqtng0AfHFY. Electric eel video: . http://www.cnn.com/videos/us/2016/06/07/electric-eel-discovery-vanderbilt-university-vstan-orig-bpb.cnn. “Head” regions of phospholipids are hydrophilic, so love water. “Tail” regions are hydrophobic, so fear water and “hide” from it. In other words, cells membranes form in water because they HAVE to!. Physio. logical Basis of Behavior. jp-rosenfeld@northwestern.edu. This is a psychology course…. …BUT:. in this first quarter, it’s hard to tell, as . we mostly . cover neurophysiology, . neuroanatomy. By. Dr. . Ayisha. . Qureshi. Assistant Professor, Physiology. MBBS, MPhil. OBJECTIVES. By the end of this lecture, you should be able to:. Define Nernst potential . Use the Nernst equation to calculate the values of Nernst potential for Na, K & Cl. 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. logical Basis of Behavior. jp-rosenfeld@northwestern.edu. We study how the brain makes mind and behavior. METHODS (in oversimplification terms):. 1.. Lesions. (Ablation): Oldest Method; 2 ways:. a) Natural: Take them as they come (bullet holes, tumors; “Neuropsychology”.) .