Nervous Tissue Flashcards
What is the functional unit of the nervous system?
Neuron
What are the three basic components of the neuron?
Cell body/soma
Axon
Dendrites
What type of neuron are motor and interneurons?
multipolar
What do you call rough ER that has been stained with a Nissl stain?
Nissl bodies
What type of collagen are neurofilaments?
type 4
What part of the neuron has the lowest threshold of excitability and therefore is the cell’s impulse initiating mechanism?
The initial segment
Neurons like to have support cells called ______ to help provide them with nutrients.
Gleal cells
Orthograde vs retrograde
ortho – from cell body to nerve endings
retro – nerve ending to cell body
What microtublue activated ATPase can transport enzymes, proteins, neurotransmitters needed for synaptic vesicle production in the orthograde direction?
Retrograde direction
Kinesin – ortho
Dynein – retro
What are Schwann cells called in the CNS? Both produces myelin
Oligodendrocyte
What causes the synaptic vesicles to fuse with the presynaptic membrane and release neurotransmitters?
Depolarization of the axon
Neurogila?
Cells that function in mechanical and metabolic support of neurons
What is a phagocytic neuroglia that is specialized to be in the nervous system?
Microglia
Which astrocyte is in white matter and which is in gray?
Protoplasmic astrocyte is in gray matter
Fibrous astrocyte is in white matter
What is the main function of astrocytes?
Electrolyte balance in CNS and nutrient transport to neurons
