CNS vs PNS
What is the division of the nervous system that includes the brain and spinal cord.
Central nervous system (CNS).
The function of the nervous system that receives information about the environment.
sensation
The main body of a neuron containing the nucleus and organelles.
soma (cell body)
A cluster of neuron cell bodies in the central nervous system.
The outermost connective tissue layer that surrounds an entire nerve.
epineurium
The division of the nervous system that includes all neural structures outside the brain and spinal cord.
Peripheral nervous system (PNS)?
The function where sensory information is processed with memories, learning, or emotion.
integration
Branching neuron structures that receive signals from other neurons.
dendrites
A cluster of neuron cell bodies in the peripheral nervous system.
ganglion
The connective tissue layer that surrounds bundles of axons called fascicles.
perineurium
The cavity in the skull that contains the brain.
Cranial cavity.
The function of the nervous system that causes muscles or glands to act.
response
The neuron projection that carries electrical signals to target cells.
Axon
These two types of nervous tissue regions are distinguished by the presence of neuron cell bodies versus myelinated axons.
gray matter and white matter
The connective tissue layer surrounding individual axons.
endoneurium
The cavity within the vertebral column that contains the spinal cord.
Vertebral cavity.
The type of response involving contraction of skeletal muscle.
voluntary response
The region where the axon begins and signals are first generated.
axon hillock
A bundle of axons in the peripheral nervous system.
nerve
The PNS glial cell that produces myelin around axons.
Schwann cell
In nervous system terminology, a bundle of axons is called a nerve in the peripheral nervous system, but in the central nervous system it is called this.
Tract
The nervous system division that controls involuntary actions like smooth muscle contraction and gland activity.
autonomic nervous system
The direction that information travels through a neuron according to its polarity.
dendrites to cell body to axon to terminals.
The tissue regions mostly composed of axons insulated with myelin.
white matter
The gaps between myelinated segments of an axon where signals are “recharged.”
nodes of Ranvier