Watching this resources will notify you when proposed changes or new versions are created so you can keep track of improvements that have been made.
Favoriting this resource allows you to save it in the “My Resources” tab of your account. There, you can easily access this resource later when you’re ready to customize it or assign it to your students.
When a neuron is stimulated, an electrical impulse is generated and conducted along the length of its axon, which is called action potential which underlies many functional activities in the nervous system
Identify principles of electricity that are important in neurophysiology
Voltage and current are two important factors to consider in the study of neurons.
The flow of electrical charge from one point to another is called current.
Across the cellular membranes, there is a potential difference established between the outside of a cell and the inside of the cell which can affect the flow of current across the cell membrane.
Voltage and current are two important factors to consider in the study of neurons.Voltage, is the measure of potential energy generated by separated charge. It is measured in volts or millivolts. The greater the difference in charge between two points, higher the voltage. Voltage is equal to the work that would have to be done, per unit charge, against a static electric field to move the charge between two points. A voltage may represent either a source of energy (electromotive force), or it may represent lost or stored energy (potential drop).
The flow of electrical charge from one point to another is called current. The amount of charge that moves between two points depends on two factors: voltage and resistance. Resistance is the hindrance to the flow of charge. Some substances with high resistance are insulators, just like the myelin sheath.
In the body, electrical currents reflect the flow of ions across cell membranes. Since there is a slight difference the number of positive and negative ions on the two sides of the cellular plasma membrane, so there is a potential difference across the membranes. Diffusion arises from the statistical tendency of particles to redistribute from regions where they are highly concentrated to regions where the concentration is low . The difference in potential established between the outside of a cell and the inside of the cell can affect the flow of current across the cell membrane.
Source: Boundless. “Principles of Electricity.” Boundless Anatomy and Physiology. Boundless, 08 Aug. 2016. Retrieved 28 Sep. 2016 from https://www.boundless.com/physiology/textbooks/boundless-anatomy-and-physiology-textbook/overview-of-the-nervous-system-11/neurophysiology-113/principles-of-electricity-611-9137/