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An engineer who was unemployed for a long time decided to open a medical clinic. He puts a sign outside the clinic: "A cure for your ailment guaranteed at $500; we'll pay you $1,000 if we fail." A Doctor thinks this is a good opportunity to earn $1,000 and goes to his clinic. Doctor: "I have lost my sense of taste." Engineer: "Nurse, please bring the medicine from box 22 and put 3 drops in the patient's mouth." Doctor: "This is Gasoline!" Engineer: "Congratulations! You've got your taste back. That will be $500." The Doctor gets annoyed and goes back after a couple of days later to recover his money. Doctor: "I have lost my memory, I cannot remember anything." Engineer: "Nurse, please bring the medicine from box 22 and put 3 drops in the patient's mouth." Doctor: "But that is Gasoline!" Engineer: "Congratulations! You've got your memory back. That will be $5...

CELL'S ELECTROCHEMICAL COMMUNICATION Sodium channel function Peak to peak 12.5 mSec (80Hz) Pulse width at threshold is close to 1.7mSec. (588Hz) Threshold -55mV Lov peak/Resting potention ~-70mV High peak ~+30mV variations from types of cells. What is Action Potential? How is it Generated in Neuron? Clear and Concise Explanation of Phases. Cells are polarized, meaning there is an electrical voltage across the cell membrane. In a resting neuron, the typical voltage, known as the RESTING membrane potential, is about -70mV (millivolts). The negative value means the cell is more negative on the INSIDE. At this resting state, there are concentration gradients of sodium and potassium across the cell membrane: more sodium OUTSIDE the cell and more potassium INSIDE the cell. These gradients are maintained by the sodium-potassium pump which constantly brings potassium IN and pumps sodium OUT of the cell. A neuron is typically stimulated at dendrites and the signals spread through t...