Nervous Tissue Flashcards
What are the nerve fibre types ?
A- alpha myelinated some sensory motor A- beta myelinated sensory A- delta myelinated special sensory Gamma - myelinated sensory C - unmyelinated sensory some somatic
How many pairs are in each category of spinal nerves
8 cervical 12 thoracic 5 lumbar 5 sacral 1 cochlear
What is the inner section of the spinal chord ?
What does it contain ?
Grey matter
Contains cell bodies
What is the outer section of the spinal chord ?
What does it contain ?
White matter
Contains myelinated axons
What does the dorsal horn contain ?
Posterior part
Location of : first order afferent neurone terminals
Contains cell bodies of second order sensory neurones
What does the ventral horn contain ?
Anterior
Contains cell bodies of motor neurones
In the brain what is the arrangement of neural tissue ?
Grey matter outside
White matter inside
What is the mid brain responsible for ?
Visual and auditory reflexes, pain control
What is the hind brain responsible for ?
Control of balance, control of breathing and vital centres
What is the thalamus for ?
Sensory centre
What does the hypothalamus control ?
Homeostasis, hormone production , motivation , emotional responses
What does the cerebellum deal with ?
Sensory, motor, language, memory perceptions, sensory motor integration
What sort of matter is the cerebral cortex ?
Grey matter
What sort of matter is the corpus callosum ?
White matter
What are the areas of the brains / bones of the skull ?
Parietal
Frontal
Temporal
Occipital
In the parasympathetic ns where are cell bodies of pre gang ?
Brain stem - cn 3,7,9 and 10
Spinal chord - s 2,3,4
In the sympathetic system where are pre gang bodies ?
Thoracic 1 - lumbar 2
What length are the pre and post in parasympathetic ?
Where are cell bodies ?
Pre - long
Post - short
Near / in effector organ
What are the length of pre/ post in sympathetic ?
Where are the cell bodies ?
Pre and post similar length
In synapse / adrenal medulla
Which part of the adrenal gland behaves more like neural tissue ?
Adrenal medulla
What do ependymal cells do ?
Where are they found ?
Cns Line ventricles Produce cerebrospinal fluid Selectively permeable Barrier function
What do Oligodendrocytes do?
Where are they found ?
Cns
Structural support
Forms myelin sheath
Not limited to one axon
What do Schwann cells do ?
Where are they found ?
Pns
Myelin sheath
One axon segment
Makes up white matter
What makes up the cns ?
Brain spinal chord
What makes up pns ?
Spinal nerves
Cranial nerves
What are microglia ?
Where are they found ?
Cns
Small
Protect by phagocytosis
Clear cell debris
What are astrocytes ?
Where are they found ?
Cns - star shaped Maintain chemical environment Blood brain barrier, for scar tissue in brain Provide nutrients Take up excess transmitter
What are neuroglia ?
Where are they found ?
Both
Divide and multiply
In disease fill up spaces
What are satellite cells ?
Where are they found ?
Pns
Flattered cells
Regulate chemical environment
Involved in repair
