Neurobiology Lecture 2 Flashcards
(31 cards)
T/F human with larger bodies have larger brains
True
Do larger humans have the same number of neurons as a smaller human?
Yes, and not predictive of intelligence
Does higher synapse number correlate with cognitive capacity?
no
Skull and vertebral column provide
protection
CNS is further protected as a result of being suspended within the
meninges
What do the meninges do
encase the brain and allow it to float, bouyancy
What are the three membranes that surround the brain
dura
arachnoid
pia
Subarachnoid space is filled with
CSF
T/F CSF maintains homeostasis of neuroendocrine factors by flushing out of brain into bloodstream
T
Where is CSF produced
choroid plexus
Lumbar ____ contains CSF below the level of the spinal cord
Cistern
What is hydrocephalus
clog narrow portions of the ventricular system–ventricles inflate if before skull plates have fused
Lateral ventricle to
cerebral hemisphere
Third ventricle to
thalamus
Cerebral aqueduct to
midbrain
Fourth ventricle to
below cerebellum/above pons
How are things absorbed into the bloodstream?
at arachnoid villae
What does the nissl stain stain
rough ER purple
Nissl stain: what does it help see
cell bodies; soma
What does H and E stain
Hematoxylin stains cell nuclei purple blue
Eosin stains cytoplasm pink
With H and E stain can axons and dendrites be distinguished well
no
What does weigerts myelins stain
classic for staining myelinated tissues a dark black while leaving unmyelinated tissues pale, first developed in 1884
How long does weigerts myelin stain take to develop
days
weil stain is less ____ than weigerts
crisp
