Zusammenfassung der Ressource
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.