Nervous System

The part of the nervous system that transmit impulses from the CNS to skeletal muscle is the

• somatic motor nervous system

• autonomic nervous system

• central nervous system

• afferent division

A neuron with many short dendrites and one long axon is a

• multipolar neuron

• bipolar neuron

• unipolar neuron

Neuroglia that help remove bacteria and debris from the CNS are called

• oligodendrocytes

• ependymal cells

• astrocytes

• somas

Myelin sheaths can be formed by

• cell process of oligodendrocytes

• schwann cells

• astrocytes

• ependymal cells

• both a and b

Clusters of nerve cell bodies within the PNS are called

• nuclei

• nodes of ranvier

• myelin sheaths

• ganglia

Concerning conditions in a resting cell membrane

• there are more potassium ions outside the cell than inside

• there are more sodium ions inside the cell than outside

• the cell membrane is more permeable to sodium ions than potassium ions

• the sodium potassium exchange pump moves sodium out of the cell

• all of the above

To produce an action potential in a neuron

• depolarization must occur

• the threshold level of membrane potential must be reached

• the cell membrane must become permeable to sodium ions

• all of the above

Neurotransmitters are released in a synapse and bind to

• presynaptic terminals

• the synaptic cleft

• the base of the axon

• receptors on the postsynaptic terminal

Important centers for control of heart rate, blood vessel diameter, breathing, swallowing and coughing are located in the

• cerebrum

• cerebellum

• medulla oblongata

• basal nuclei

Tags

NGSS.HS-LS1-3

Our conscious state is maintained by activity generated in the

• cerebellum

• reticular formation

• limbic system

• medulla oblongata