PSYCH 3313 Lecture Notes - Lecture 5: Resting Potential, Potassium Channel, Ion Transporter

19 views5 pages

Document Summary

Tools for measuring a neuron"s electrical activity: oscilloscope, microelectrodes. Giant axon of the squid: much larger in diameter than human axons. Squid: up to 1 millimeter (1000x humans: used by hodgkin and huxley in the 1930s and 1940s. Hydrophilic: likes to be around other water molecules. Extracellular vs. intracellular fluid: extracellular = more sodium and chloride ions (more like concentration of seawater) B: patterns roughly the same in squids and humans. More ions in squid b/c lives in seawater. Diffusion: molecules move from areas of high concentration to areas of low concentration. Psych 3313: like charges repel, electrical gradient. Concentration gradients and voltage gradients: concentration = diffuses from initial point of contact until it is equally distributed throughout, voltage = positive and negative ions flow down their electrostatic gradients until positive and negative charges are equal everywhere. Equilibrium: balance occurs when the concentration gradient = voltage gradient, barriers. Over time ions disperse through section but cannot always cross: overcoming barriers.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents