Organisation Of The Nervous System Flashcards
What are the nerves that go to the brain called?!
Afferents
What are the nerves that go from the brain called?!
Efferents
What are the two motor components of the PNS called?!
Autonomic and somatic
What are autonomic effectors?!
Smooth muscles
Cardiac muscles
Glands
What are the effectors of the somatic muscle called?!
Skeletal muscle
What are the two types of cell in the brain?!
Neurones and glia
What is an example of an excitatory neurotransmitter?!
Glutamate
What is an example of an inhibitory neurotransmitter?!
GABA
What is a nucleus?!
Collection of cell bodies in the CNS
What is a tract?!
Group of functionally related axons in the CNS
What is a nerve?!
Bundle of axons in the PNS
Are the afferents in the somatic nervous system myelinated or un myelinated?!
Either
Are the efferents in the somatic nervous system myelinated or unmyelinated?!
Heavily myelinated
What do the efferents in the somatic nervous system release?!
Acetylcholine
What do afferents in the somatic nervous system release?!
Glutamate
Where is the ganglia located in the sympathetic division?!
Close to the CNS
Describe the preganglionic and postganglionic structures in the sympathetic division.
Pre: short and myelinated
Post: long and branched extensively
Describe the preganglionic and postganglionic structures in the parasympathetic division.
Pre: long and myelinated
Post: short
What neurotransmitter does the postganglionic sympathetic division release?!
NA
What do oligodendrocytes do?!
Form the myelin sheath
What do astrocytes do?!
Provide nutrients
What do micro glia do?!
Clean up excess CNS debris
