Electrical Properties of Neurons
the godfathers of neurobiology
who are Golgi and Cajal?
definition of Eion
how neurons fire
what is all or none?
description for Vm of neurons
what is dynamic?
the three main components of a neuron
what is dendrites, cell body, and axon?
membrane potential in regards to increase in extracellular K+
what is increase in Vm to become less negative in order to match Eion
determines whether or not AP fire
what is when Vm reaches threshold?
the way neurons are at rest
what is polarized?
prevents charged particles from crossing the membrane
what are hydrophobic tails?
the equilibrium potential for the four ions
what is -80 mV for K+, +62 mV for Na+, +123 mV for Ca2+, and -65 mV for Cl-?
three properties of channels
what is selectivity, gating, and high conductance?
state in which membrane is depolarized
what is less negative Vm?
allowed for more detailed characterization of the cell and cell body
what is the golgi stain?
function of the Nernst equation
what is determines Eion based on concentration gradient?
describe the paradox theory
point where membranes repolarize
what is resting state?
found that neurons are individual cells and are not continuous with each other
who is Cajal?
the three predictions of Hodgkin and Huxley
what is currents evokes should be dependent on Vm, two currents from potential generating depolarizations can be isolated, and different temporal kinetics of ionic currents?
trend of AP firing
what is increased firing with increased stimulus?
trend of Vm in response to current/stimuli
what is depolarization (increase in Vm), repolarization (return to Vm), and hyperpolarization (potential less than resting Vm)?