Fundamentals Module 2 Exam Study Guide

Subthreshold

Amplitude of the induced current from ___ stimuli attenuates as it flows down the axon

Nonregnerative

Membrane potentials induced from subthreshold stimuli is ___

Saltatory conduction

Action potentials jump from node to node in presence of myelin

Hydrolysis

One way in which ion pumps may be powered in the cell membrane is by the ___ of adenosine triphosphate (ATP)

Electrochemical

One way in which ion pumps may be powered in the cell membrane is by the ___ gradients of ions

K

Most relative amount of ionic species within resting neuron

Na

Second most relative amount of ionic species within resting neuron

Ca

Least relative amount of ionic species within resting neuron

Amplitude

The ___ generated by an action potential is of uniform size and that it does NOT increase or decrease depending on the strength of the depolarizing current.

Potassium channels

activation of voltage-gated ___ in the axonal membrane behind the traveling action potential prevent another action potential from forming at this time and location.

Nernst equilibrium

the resting membrane potential of most neurons (-70mV) is closest to the ___ potential for potassium ions (-90mV) because the neuronal membrane is most permeable to potassium ions while at rest.

Back propagate

Action potentials may ___ from the neuron’s cell body (soma) to its dendrites.

Voltage sensor

The ___ is the charged amino acid domain in a voltage-gated ion channel that alters the ion permeability of the channel in response to changes in membrane potential.

oligodendrocytes

The central nervous system neurons are myelinated by ___.

Nodes of Ranvier

The gaps between these sections of myelin are known as the ___

Neurotransmitters

__ are a type of ligand that could bind to extracellular ligand-gated ion channels

Ligand

Calcium can activate intracellular ___-gated ion channels.