4. Nervous System Flashcards
What are the most numerous glial cells in grey matter?
Astrocytes
What is rER called in neuron cell bodies?
Nissl substance
What connective tissue layer surrounds a nerve fasicle?
Perineurium
This part of the neuron is the part that receives impulses from other neurons.
Dendrites
What connective tissue layer surrounds multiple nerve fascicles?
Epineurium
What type of cell is responsible for myelination in the peripheral nervous system?
Schwann cell
What is the name of the dense collagenous menigeal layer that is usually attached to the periosteum of the skull?
Dura Mater
What cell in the central nervous system forms a type of scar tissue?
Astrocyte
Which type of cell is responsible for myelination in the central nervous system?
Oligodenrocyte
What is the name of the thin menigeal layer that touches the brain and spinal cord?
Pia mater
Nerves which conduct from the outside towards the CNS are called?
Afferent
The molecular layer, the purkinje cell layer and the granular layer is found in what part of the brain?
Cortex of the cerebellum
What connective tissue layer surrounds individual nerve fibers?
Endoneurium
Which neuron fiber does not have nissl substance?
Axon
Which layer of the brain houses blood vessels and is the location where CSF flows?
Arachnoid
What is a peripheral collection of cell bodies, support cells and occassional axons?
Ganglia
Nerves which conduct messages from the central nervous sytem to the outside are called?
Efferent
Gaps found in myelin are called what?
Nodes of Ranvier
What structure produces cerebral spinal fluid
Choroid plexus
What is the name for the jumping kind of conduction found in myelinated nerve fibers?
Saltatory
Which neuroglial cell is part of the immune system?
Microglia
What are the specialized epithelial cells that line the ventricles and the central canal of the spinal cord?
Ependymal cells
What is the glial cell that is derived from a bone marrow precursor?
Microglia
What is the middle menigeal layer called?
Arachnoid
Which neuroglial cell provides physical support, controls the chemical environment and creates contact with one another?
Astrocytes
Which of the following is NOT a characteristic of neuron cell bodies?
1) condensed nucleus
2) dispersed chromatin
3) presence of nucleoli
4) large nucleus
1) condensed nucleus
Where do blood vessels on the surface of the brain generally run in?
Sub arachnoid space
What is another name for the stratum basale?
Stratum germinativum
Do neuron cell bodies have a condensed nucleus or dispersed chromatin?
Dispersed chromatin
Where can satellite cells be found?
Ganglia
