Random Test 1 Stuff Flashcards
(31 cards)
Cerebral arterial circle is formed by which arteries
Basilar and L/R Internal carotids
Main supply to cerebral hemispheres
middle cerebral artery
Main venous drainage from brain
Dorsal saggital sinus
Blood supply to spine in 1) cervical region 2) Thoracic region 3) lumbar region
1) Vertebral Arteries
2) Intercostal arteries
3) lumbar arteries
Blood supply to spine? Which is landmark?
Dorsal and ventral spinal arteries
*Ventral Spinal artery=landmark
Which two arteries make up basilar artery?
Ventral Spinal and Vertebral
3 Structures of Blood Brain Barrier
1) Endothelial Tight Junctions
2) Astrocyte processes
3) Non-fenestrated capillaries
3 Circumventricular organs
1) Median eminence
2) area postrema
3) pineal gland
Flow of CSF
Lateral ventricles–> interventricular foramen–> 3rd ventricle–> mesencephalic aqeuduct–> 4th Ventricle–> Subarachnoid and/or central canal of spinal cord
Places to collect CSF
1) Cisterna magna
2) Lumbo-sacral junction
Term for areas that produce CSF
Choroid Plexus
3 Types of neurons
1) Projection
2) Commissural
3) Associative
3 ways neurotransmitters are cleared from synapse
1) enzyme degradation
2) reuptake into axon terminal or glial cells
3) diffuses away
Precursor molecules for Acetylcholine
Acetyl CoA & Choline
Two things that can interfere with ACh release…and their result?
Botulism and tick paralysis…
Flaccid paralysis
Two receptor types for ACh
Nicotinic (ligand-gated)
Muscarinic (G protein coupled)
Which enzyme degrades ACh? Which prevents it?
Degrades: Acetylcholinesterase
Prevents: Cholinesterase inhibitors
Two categories of Monoamines and which NT fall under which
Catecholamines– NE, dopamine
Indolamines– Seratonin
Precursor molecule for monoamines
Tyrosine
Which enzymes degrade monoamines? Inhibits?
Monoamine oxidases (MAO) Monoamine oxidase inhibitors
Dopamine functions
control of movement, emotion, motivation, stimulates hormone release from pituitary
Seratonin functions
mood, memory, sleep, cognition, depression
Categories of Amino acid NTs…which fall where?
Excitatory (Glutamate) & Inhibitory (GABA, Glycine)
Which NT plays an important role in seizures?
Glutamate
