Neurons Flashcards
What is the function of nervous tissue?
React to stimulus and respond to intracellular and extracellular change.
What is the life time of nerve cells?
forever
Do nerve cells divide?
no
True or false- new nerve cells can be made in a life time.
True- via stem cell
What is structural classification of nervous tissue?
CNS (spine + brain) and PNS (all but spine + brain)
What is functional classification of nervous tissue?
ANS (viscera) and SNS (sensory)
What are the nerve cells involved in nervous tissue?
Neuron and neuroglia
True or false- motor has pseudounipolar and bipolar
False- sensory
True or false- Sensory has multipolar
True
True or false- anaxonic has no axon
True
True or false- all neurons have only 1 axon
true- some are divided
What are the 4 structural classification neurons?
- pseudounipolar
- bipolar
- multipolar
- anaxonic
What are the 4 functional classification of neurons?
- Sensory
- Motor
- Interneuron
- Integrative
True or false- sensory and motor function at both somatic and viscera
True
True or false- Interneuron is between sensory and motor
true
What neuroglia cells do CNS have?
- astrocyte
- Microglia
- oligodendrocyte
- Ependymal cell
What neuroglia is largest in CNS?
Astrocyte
Whats point of astrocyte?
Mechanical and physical support
Whats point of microglia?
Phagocytic
Whats neuroglia is smallest in CNS?
oligodendrocyte
Whats the point of oligodendrocyte?
Myelin production
Whats the point of Ependymal cell?
make cerebrospinal fluid
What neuroglia cells do PNS have?
schwann and satellite
Whats the point of satellite cell?
support and insulate
Whats the point of schwann cell?
nerve support for myelin and nonmyelin and clean PNS debris
Which part is dorsal part of spinal?
Sensory
Which part is ventral part of spinal?
Motor
What are neurons made of?
- dendrites
- cell body
- axon
- myelin sheath
True or false- cell body has golgi apparatus
true
What makes proteins in cell body?
nissil bodies
Where are nissil bodies found?
only cell body and no where else.
What do axon contain of?
Has microtubules, neurofilament vesicle and mitochondria
How does PNS myelinated differ to nonmyelinated?
Myelinated= sucessive layer while non doenst Myelinated= outer layer cytoplasm + nucleus
How does CNS myelinated differ to nonmyelinated?
myelinated= oligodendocyte- parallel nonmyelinated= bare
Whats the connective tissue for PNS?
Epinerium (dense irregular): peripheral of nerve- fill space- blood travel through it
Perinerium (loose/ arleor): nerve fibre + blood vessel
Endornerium (delicate reticular): no vascular
What is the grey areas function in spine and brain?
nonmyelinated
Where is grey area of brain located?
out
Where is grey area of spine located?
in
What are the three synapses?
axodendritic, axosomatic and axoaxonic
What are chemical synapes?
neurotransmitter
What are example of electric synapses?
gap junction
