first 3 quiz exam 4

At rest, neurons have ____ on the intracellular side of the membrane

• Na

• K

• Ca

Protein channels in the cell membranes that open or close in response to changes in electrical activity along a membrane are referred to as

• voltage-gates channels

• open-channels

• ligand-gates channels

Depolarization ends when voltage-gated Na channels close around

• +30mV

• +50mV

• -60mV

At rest, neurons have ____ on the extracellular side of the membrane.

• Cl

• Na

• K

The overall net charge on the inside (intracellular side) of the neuron membrane at rest is

• neutral

• positive

• negative

The neuroglia that provide a myelin sheath in the PNS are called

• microglia

• oligodendrocytes

• schwann cells

Neurons that conduct impulses from sensory receptors to the CNS are classified functionally as

• motor (efferent) neurons

• interneurons

• sensory (afferent) neurons

A neuron with no dendrites and a single axon is classified structurally as a ___________ neuron.

• bipolar

• unipolar

• multipolar

The part of the nervous system that's responsible for integrating sensory information is

• Central Nervous System

• Afferent division of PNS

• Efferent division of PNS

Afferent neurons are a function of

• integration

• motor output

• sensory input