Psych/Soc Flashcards
in CNS groups of cell bodies are called
nuclei
in the CNS groups of axons are called
tracts
in PNS groups of cell bodies are called
ganglia
in the PNS groups of axons are called
nerves
afferent neurons =
sensory neurons
afferent neurons go
from the body to the CNS
efferent neurons =
motor neurons
efferent neurons go
from the CNS to the body
interneurons send
info between motor and sensory neurons
most common neuron type
interneurons
4 main types of glial cell
- Oligodendrites
- Schwann cells
- microglia
- astrocytes
0ligodendries wrap
mult neurons of CNS in myelin
Schwann cells
wrap single neurons of PNS in myelin
Schwann cells can direct
axonal regeneration post damage
microglia
can trigger inflammatory responses and engulf debris
astrocytes
largest glia, many functions
membrane potential
difference in charge between inside and outside of cell
axon internal charge at rest
-
outside axon charge at rest
+
resting potential
70mV
EPSPs
excitatory post synaptic potentials, increase a neurons chance of firing
IPSPs
inhibitory post synaptic potentials, decrease a neurons chances of firing
4 types of small molecule neurotransmitters
- acetylcholine
- Amino acid
- monoamine
- unconventional
acetylcholine is present
at each motor neuron and skeletal muscle junction
