neurons and spinal cord Flashcards
A. dendrite
B. cell body
C. axon hillock
D. axon
E. myelin sheath
F. node of ranvier
G. axon terminal
a multipolar neuron structure is what kind of neuron
motor neuron
a unipolar neuron structure is what kins of neuron
sensory neuron
A. bipolar neuron structure
B. unipolar neuron structure
C. multipolar neuron structure
3 functional classifications of neurons and their locations as it pertains to the spinal cord
- sensory (afferent) enters spinal cord through dorsal root
- motor (efferent) exits spinal cord through ventral root
- interneurons (association) in the gray matter of spinal cord
what are nuclei
groups of cell bodies in the CNS
what are ganglia
groups of cell bodies in the PNS
what is a tract
a bundle of myelinated axons in the CNS
what is a nerve
a bundle of myelinated axons in the PNS
A. gray commissure
B. dorsal horn (pointy)
C. ventral horn (rounded)
D. white columns
E. central canal
A. dorsal root
B. dorsal root ganglion
C. ventral root
where is the cell body of a sensory neuron located
dorsal root ganglion
where is the cell body of a motor neuron located
ventral root
meninges function
cushion and protect spinal cord and brain
3 layers of meninges and their order
- dura matter: superficial
- arachnoid matter: deep to the dura matter
- pia matter: deep to the arachnoid matter
A. conus medullaris
B. cauda equina
C. filum terminale
