PPT-MEMBRANE 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 . 2nd. practice. Medical Informatics. Biomedical Signal Processing. TAMUS, Zoltán Ádám. zoltanadam_tamus@yahoo.com. Examples of Biomedical Signals. Action potential. Electroneurogram (ENG). Electromyogram (EMG). 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 . Tidbit Title: Understanding membrane potentia. l. Facilitators:. Thomas Torello, Harvard University . Cynthia Wagner, UMBC. Howard Sirotkin, Abhay Deshpande: Stony Brook University. Thomas Abbott, Kristen Kimball: UCONN. MEMBRANE. SEPARATION. TRANSPORT MODELS. Membrane s. elective : . Ability . to control the rate of permeation of different species. Permeation mechanism model. Solution-diffusion model. Permeants. . dissolve in the membrane material and then diffuse through the membrane down a concentration gradient. “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. Pratt & . Cornely. , Ch. 9. Thermodynamics. Membrane potential—volts. For +1 ion, potential = 0.058V(log. ). If potential is negative, the inside of cell is more negative.  . Energetics of Transport. 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. Conveys information over long distances. Cytosol has negative charge relative to extracellular space. Neural code - frequency and pattern. Action potential. Spike. Nerve impulse. Discharge . Properties of the Action Potential. Section 3-2 Chapter 7. Phospholipid Bilayer. The membrane is composed of two layers of phospholipids . Phospholipids are . ampipathic. . Hydrophobic tail. Hydrophyllic. head. Selectively Permeable. By Jaclyn Eisdorfer. The Resting Membrane Potential (RMP). Negative resting potential with a value of about . -70mV. Produced by . active transporters . ATPase Pumps: primary active transport. Ion Exchangers/Cotransporters: secondary active transport. TECHNOLOGY. PRESSURE DRIVEN MEMBRANE PROCESS. Various pressure-driven membrane process can be used to : . 1. Concentrate . 2. Purify a dilute (aqueous or non aqueous). THE PARTICLE OR MOLECULAR SIZE AND CHEMICAL PROPERTIES . What is the plasma membrane?. A flexible boundary between the cell and its environment which maintains . HOMEOSTASIS. within the cell. **Remember that . HOMEOSTASIS. is a state of balance/equilibrium within the cell..