Exam 3: Cells of the Nervous System

Presynaptic facilitation occurs at a synapse between a presynaptic axon and a postsynaptic dendrite,and leads to more frequent signaling by the postsynaptic cell.

Which type of glia is responsible for forming myelin in the peripheral nervous system?

Which of the following is not a function that can be influenced by metabotropic receptors?

One very active synapse might lead to an action potential in a postsynaptic cell due to

What does it really mean when we say that a neuron has a resting potential of -70 mV?

What role do neurons and astrocytes possibly share?

A neuron is unable to produce another action potential under any circumstances during the

Which of the following statements best describes the propagation of action potentials?

The difference between the intracellular and extracellular environments at the peak of the action potential is approximately _________mV.

The arrival of an action potential at the axon terminal results in the opening of

The greater the influx of calcium into the presynaptic axon terminal,the greater the

The most numerous of the cytoskeleton fibers are the

"Permeability" refers to the ability of the cell's

The first consequence of a neuron's reaching threshold for an action potential is the opening of _________ channels.

The nervous system encodes greater stimulus intensity by

Inflammation caused by which of the following types of glia is believed to contribute to neurodegenerative diseases,such as Alzheimer's disease and Parkinson's disease?

An important function of the astrocytes is to regulate the chemical environment of the synaptic gap.In particular,the astrocytes remove excess amounts of which of the following chemicals from the gap?

In the resting neuron,sodium is pushed

Larger diameter axons usually transmit information _________ smaller diameter axons.

Channels that open when they come in contact with specific chemicals are known as