The Nervous Sytem 1 And 2 Flashcards
Name the 2 types of nervous tissues
Neurons and supporting tissues (neuralgia)
Name the glial cells
Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
Glial cells in the PNS
Schwann cells
Satellite cells
Property of neuroglia
Divide throughout life
Smaller and darker than neurons
Atrocytes
Star shaped , the most numerous
Involved in metabolism and synapse information
Microglia
Phagocytes
Ependymal cells
Line the cavity of CNS and spinal cord , cilia
Oligodendrocytes
Produce myelin sheath in CNS
What are myelin sheath made out of
Lipoprotein
Function of myelin
Increases speed of conduction , large axons are insulated
Prevents leakage of electric current
Where is myelin found
PNS and CNS
What happens to a person with multiple sclerosis
Patches of myelin sheath are destroyed in brain and spinal cord
What is a synapse
Are the contact points where one neuron communicates with another
True or false
Synapses are multidirectional
False
What happens at the synapse
When the nerve impulse reaches the synapse at the end of neuron , it cannot pass directly to the next one
It stimulate the neuron to release a chemical neurotransmitter
The neurotransmitter drift across the gap between the two neurons
