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Nervous Tissue
Nervous Tissue
29
Anatomy
Undergraduate 3
05/22/2011

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Cards

Term
What germ layer does nervous tissue arise from?
Definition
ectoderm
Term
Define CNS
Definition
Brain, brain stem, spinal chord
Term
Define PNS
Definition
Spinal, cranial, and autonomic nerves
Term
What is the general difference in roles of CNS and PNS
Definition

PNS= sense and gather info from environment

CNS= coordination of sensory info and motor coordination

Term
Role of Dura Mater?
Definition
Dense CT prevent physical trauma
Term
Role of Arachnoid layer
Definition
Loose CT for CSF circulation
Term
Role of Pia Mater
Definition
Vascular layer carries blood vessels into CSF
Term
Difference between white and grey matter?
Definition

White=densely packed with fibers

Gray= densely packed with cells

Term
True or false:  Glia is a nervous tissue cel type
Definition
true
Term
What are the nervous cell types?
Definition
Glia, and neurons
Term
role of Glia?
Definition

non-exciteable

enhance transmission of nerve impulse

Term
Role of neuron?
Definition
carry out sensory info
Term
What are the types of neural fibers?
Definition

myelinated

unmylinated

Term
Name the parts of a neuron.
Definition

Soma

Dendrites

Axon

Axon Hillock

Axon terminal

Term
What structures contained in soma?
Definition

Nucleus with very distinct nucleolus

Lots of euchromatin

Nissl Substance (ribosome-rich RER)

sytoskeleton

golgi

mitochondria

Term
What structures in dendrite?
Definition
similar to soma, but no golgi
Term
What elements are in the axon?
Definition

No RER, but SER

cytoskeletal elements for transporting vesicles

Term
Axon terminal define
Definition

Sends signal to neuron, muscle, gland, cell etc.

Lots of vesicles and mitochondria

Term
What are the parts of a synapse?
Definition

presynaptic terminal

synaptic cleft

post-synaptic membrane

Term
What are the different types of glial cells?
Definition

Mary Ate Oranges Everyday

Microglia- macrophage

Astrocyte- conduct nutrient flow from blood to neurons

Oligodendrocyte- myelination

Ependymal- produce CSF

Term
BLood Brain barrier is composed of...
Definition

Capillary endothelium

Basement Membrane

Astrocyte

Term
Whats the difference in PNS vs CNS myelination?
Definition

CNS= oligodendrocytes wrap around many nerve fibers

PNS= single Schwann cell wraps around a nerve fiber

Term
List layers of CT wrapping the nerves
Definition

Endoneurium- wrap nerve fibers

Perineurium- wrap fasicles

Epineurium- wrap entire nerve

Term
What layers consist of the blood-CSF barrier
Definition

capillary endothelium

Pia mater

ependymal cells

Term
True/False: Ganglia are clusters of cell bodies within the CNS
Definition
false: clusters of cell bodies outside the CNS
Term
What are nuclei (nerve tissue)
Definition
Aggregations of cell body within the white atter of cNS
Term
What are ganglionic cells?
Definition
comprise peripheral ganglia with large round neurons
Term
What are satellite cells?
Definition
comprise peripheral ganglia. Support ganglionic cells
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