Nervous System Flashcards
Golgi stain
Potassium dichromate +AgNO3
labels entire neuronal components (neurons dark brown/black)
hypocampus
long term memories/memories
Nissl stain
Thionine or Cresyl Violet
identification of neuron populations (all neurons and any other cells)
turns RNA within endoplasmic reticulum blue
what is inside the cell (cytosol)?
-60mV
many K+ & proteins
few Na+, Cl-, Ca2+
what is in extracellular fluid?
many Na+, Cl-, Ca2+
few K+ & proteins
variation in neuronal structure (4)
Cnidarian - nerve net Vertebrate - bipolar cell from retina - spinal cord motor neuron Insect neurons - 2 different
sympathetic nervous system
stress response - fight/flight
supresses parasympathetic
parasympathetic nervous system
relaxing
overall energy balance
forebrain
recieves & integrates sensory info from nose, eyes & ears
midbrain
coordinates reflex responses to sight & sounds
hindbrain
reflex controls of respiration, blood circulation, + other complex tasks
what protects the brain (4)
blood brain barrier
meninges (3 membranes)
cerebrospinal fluid
skull
developmental layers and nervous system
ectoderm forms CNS & PNS (not complete layer)
reticular activating system
attention and cognition
comes from reticular formation in brain stem
EXTRA INFO
what are the three layers of the meninges?
dura mater - tough & fibrous OUTER
arachnoid - thin & weblike INTERMEDIATE
pia mater - delicate INNER
