A&P2 Chapter 11

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Collateral Branches

Branches that may occur along an axon are called

Multipolar.

The most abundant class of neuron in the central nervous system is

Oligodendrocytes

The myelin sheath that covers many CNS axons is formed by

Ganglia

Neuron cell bodies in the PNS are clustered together in masses called

The astrocytes isolate the CNS by forming a blood-brain barrier.

Many medications introduced into the bloodstream cannot directly affect the neurons of the CNS because

Why CNS neurons cannot regenerate

Most CNS neurons lack centrioles. This observation explains

Unipolar

Sensory neurons of the PNS are

Autonomic

The ________ nervous system provides involuntary regulation of smooth muscle, cardiac muscle, and glandular activity.

Neuron

The basic functional unit of the nervous system is the

Exteroceptors

________ provide information about the external environment.

Neuroglia

________ account for roughly half of the volume of the nervous system.

Interoceptors

________ monitor the digestive, respiratory, cardiovascular, urinary, and reproductive systems.

Interoceptors

________ monitor the internal environment.

Proprioceptors

________ monitor the position of skeletal muscles and joints.

Multipolar

________ neurons are the most common class in the CNS.


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