Exam 8: Neurons: Cellular and Network Properties

Draw a motor neuron, being sure to include and label the following parts: axon(s), dendrite(s), cell body, axon collateral(s), axon terminal(s), myelin sheath, and other components as applicable.

Name the two factors that influence the membrane potential.

The portions of a neuron that extend off of the roughly spherical cell body are usually collectively called

In the membrane of a resting nerve cell, when chemically gated Cl⁻ channels open,

The inhibitory neurotransmitters of the CNS, GABA and glycine, act by opening ________ channels.

The gaps between Schwann cells are called synapses.

When more action potentials arrive at the axon terminal, how is the postsynaptic cell affected?

An influx of Na⁺ ions depolarizes the membrane of an axon.

How does the function of dendritic spines in the CNS differ from dendrites in the PNS?

The major determinant of the resting potential of all cells is

Receptors that work through second messenger systems are called ________ receptors.

Explain the processes that lead to the exocytosis of neurotransmitter from a presynaptic cell.Which components are recycled? Which ion is important in triggering exocytosis?

Tom's father suffers a stroke that leaves him partially paralyzed on his right side.What type of glial cell would you expect to find in increased numbers in the damaged area of the brain that is affected by the stroke?

Which of the following will best increase the conduction rate of action potentials?

A home satellite dish receives signals from a satellite, allowing your television to display TV shows.Which part of a neuron is analogous to the satellite dish?

Glial cells communicate primarily using

Inhibitory postsynaptic potentials (IPSPs)

Glial cells

Presynaptic facilitation occurs when

Voltage-regulated channels are located