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622358
Neurones
Descrição
A Levels Biology (Response to stimuli) Mapa Mental sobre Neurones, criado por cookietime em 11-03-2014.
Sem etiquetas
biology
response to stimuli
biology
response to stimuli
a levels
Mapa Mental por
cookietime
, atualizado more than 1 year ago
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Criado por
cookietime
aproximadamente 10 anos atrás
28
1
0
Resumo de Recurso
Neurones
Structure
cell body
contains nucleus
lots of rough endoplasmic reticulum
produces proteins and neurotransmitters
dendrons
dendrites
carries nerve impulses TO cell body
axon
single long fibre
carries nerve impulses AWAY from cell body
surrounded by
Schwann cells
protection and electrical insulation
carry out phagocytosis
removal of cell debris
involved in nerve regeneration
nodes of Ranvier
gaps between Schwann cells where there's no myelin sheath
wrapped around many times
myelin sheath
made of membranes of Schwann cells
rich in myelin
Types
Myelin sheath
unmyelinated neurones
myelinated neurones
transmit nerve impulses faster
Classifications
sensory
receptor
to intermediate or motor neurone
one dendron
carries to cell body
one axon
carries away from cell body
motor
intermediate or sensory
to effector
glands
muscles
long axon
many short dendrites
intermediate
transmit between neurones
Specialised cells adapted to carry nerve impulses across the body.
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