SFP: CNS neurons and neuroglia Flashcards
Describe the differences between gray matter and white matter
White matter is largely axons, while grey matter is mostly cells
Describe the location of grey and white matter in the spinal cord and brain
In the cord, white matter is on the outside and grey matter is on the inside. In the brain, grey matter is on the outside and white Matter is on the inside
Describe nuclei
clusters of neurons in the CNS
describe ganglia
clusters of neurons in the PNS
describe cortex
layers of cell bodies (grey matter) found on the outside of the brain
describe nerves
bundle of axons in the PNS
describe tracts
bundles of axons in the CNS
describe the function of neurons
signal processing and communication cells in the nervous system
what are nissl bodies?
ribosomes in neurons
do neurons undergo mitosis?
no!
what are the major structural components of a neuron?
dendrites, cell body, axon, synaptic bouton
what is the functional role of dendrites?
they receive input from neighboring neurons
describe dendtritic spines
small protrusions on dendrites that contain receptors for neurotransmitters and are associated with synaptic contacts.
what is associated with more dendritic spines
having more dendritic spines is associated with greater synaptic capacity and efficacy
describe the cell body
where metabolic support occurs; lots of mitochondria and nissl bodies