chapter 12 quiz

Axon, voltage

The conductive segment of a neuron is its (blank), a region that contains many (blank) gated channels.

The electrochemical gradient refers to

The combination of electrical and chemical gradients between two areas.

Conductive activity in a neuron generally causes it to secrete

A specific neurotransmitter that either excites or inhibits its target

What statement accurately compares the transmission speed of the different types of synapses?

Transmission at chemical synapses Involves a brief Synaptic delay, but electrical synapses are faster

The glial cell that defends the body against pathogens is the

Microglial cell.

The type of neuronal circuit in which several nerve impulses come together at a single postsynaptic neuron is a (blank ) circuit.

Converging

When transmission occurs at a synapse, neurotransmitter is released by

The presynaptic neurons synaptic knob into the synaptic cleft.

The most crucial factor determining the resting potential of a neuron is the diffusion of

Potassium out of the cell through leak channels.

To measure the resting potential of a neuron, a physiologist would place

One microelectrode inside the neuron and another inside the internal fluid

A depolarization is when the inside of a neuron becomes(blank) The resting membrane potential

Less negative than

Based on function, the vast majority of neurons are

interneurons

The type of neuronal circuit that uses feedback to produce a repeated clinical stimulation of the circuit is a (blank) circuit

Reverberating

Vesicles and glycoproteins required at the snaps are moved down a nerve fiber by(blank) axons transport.

Fast

The glial cell that protects neuron cell bodies located within ganglia is the

Satellite cell

what is not a a characteristic of neurons

High mitotic rate

The portion of the nervous system that conducts impulses from the skin, joints, Skeletal muscles, And special senses is the (blank ) division

Somatic sensory

In order to trigger the release of neurotransmitter from a neuron terminal, Calcium ions

Buying two proteins on the surface of synaptic vesicles

You walk into a restaurant and amidst the sights, sounds, and smells of food preparation, you notice that you begin to salivate. This is evidence that a particular neuronal circuit has been activated. What is it?

Converging

The endoneurium is composed of

Areolar connective tissue

Saltatory conduction occurs in

Myelinated axons, where action potentials occur only at neurofibril nodes.