Chapter 2 Day 2 I think

Glial Cells are:

• A specialized type of neuron

• Cells that provide support for neurons

• Bundles of axons in the CNS

• Extraparietal white matter

Oligodendrocytes myelinate ________ in the __________

• Axons; CNS

• Axons; PNS

• Glial Cells; CNS

• Glial Cells; PNS

__________ are a type of glial cell that help to protect the blood brain barrier

• oligodendrocytes

• schwann cells

• astrocytes

• microglia

Draw a neuron. Label as follows:

1=axon

2=dendrite

3=cell body

4=terminal button

5=node of ranvier

The resting membrane potential is about:

• -70 mV

• -65 mV

• -55 mV

• 0 mV

At rest, there are a lot of __________ ions OUTSIDE the cell

These are the two factors associated with the even distribution of ions:

• electrostatic pressure and random motion

• sodium potassium pumps and electrostatic pressure

• closed ion channels and random motion

• dopamine and serotonin

_______ is to depolarization as ________ is to hyperpolarization

• EPSP; IPSP

• IPSP; EPSP

• action potential; refractory period

• inhibition; excitation

The first step of an action potential is:

• Sodium channels open

• Sodium channels close

• Potassium channels open

• Potassium channels close

The end result of an action potential is the release of a __________, which then attaches to the postsynaptic neuron