Exam 3 Flashcards
What do ganglia represent groups of what?
Groups of nerve cell bodies in the PNS
Unipolar
What are axon functions?
Which is the fastest and which is the slowest induction of impulses?
Function is conduction of stimuli
Fastest is thick and mylenated
What are sensory neurons and where do you find them?
They are unipolar
PNS
Found in posterior roots of spinal cord
What are interneurons?
Multi polar, gray matter of spinal cord
Connects SA and ME
Carries sensory information
No neuron = unisynaptic / knee jerk
Types of glia and comparison of those found in both CNS and PNS
Astrocytes, oligodenocyres, microglia = CNS
Schwann cells , satellite cells = PNS
Action potentials travel along the…
Wave of electricity, the travels from the cell body down the axon to the terminals
Mylan and unmyelinated axons are what
Mylan is faster transmission of signal between neurons
Unmylinated is slower
What are the Eppy, Perry, and Endoneurium and what do they in case?
Epi – spinal nerves
Peri- fascicles
Endo- axons
Look at the difference between mono and polysynaptic reflexes, and examples of each
Monosynaptic – no interneuron (arch reflex)
Polysynaptic– interneurons (knee jerk)
Where do you sell bodies of neurons lie in the spinal cord?
Gray matter
What are the name of the chemicals released at the axon terminals and what organelles carry them?
Chemicals – ACHL
Organelles – synaptic vesicles
Sulcus vs gyrus
Sulcus : dips/ valleys
Gyrus: mountains
The lobes of the brain and their major functions
Frontal – motor skills
Occipital - vision
Temporal – hearing
Parietal – smell sensory taste
BBB and its function
Blood brain barrier (astrocytes)
Shields brain from toxic substance, filters, supplies
Where is CSF produced?
Corroid plexus / 3rd 4th ventricles
Which is the second largest region of brain
Cerebellum
Corpora quadregimini : structure and function
Located in the midbrain
Vision and hearing
Superior colliculi= vision
Inferior = hearing
Falx cerberi vs cerebelli
Cerberi: separates the hemispheres of the brain
Cerebelli: surround cerebellum