Created by ashiana121
over 8 years ago
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Question | Answer |
CELL BODY | Contains a nucleus and large amounts of rough ER Associated with the production of proteins and neurotransmitters |
DENDRONS | Small extensions of the cell body which subdivide into dentrides (smaller extensions) which carry nerve impulses TOWARDS THE CELL BODY |
AXON | A single long fibre that carries nerve impulses AWAY FROM THE CELL BODY |
SCHWANN CELLS | Surround the axon, protecting it and providing electrical insulation Carry out phagocytosis (removal of cell debris) and nerve regeneration |
MYELIN SHEATH | Covers the axon - made up of membranes of Schwann cells Rich in a lipid called myelin Myelinated neurones transmit impulses quicker than non-myelinated neurones |
NODES OF RANVIER | Gaps between adjacent Schwann cells where there is NO MYELIN SHEATH |
SENSORY NEURONE | Transmit nerve impulses from a RECEPTOR to an intermediate/motor neurone One dendron that carries the impulse TOWARDS the cell body and one axon that carries the impulse AWAY from the cell body |
MOTOR NEURONES | Transmit nerve impulses from an intermediate or sensory neurone to and EFFECTOR (gland/muscle) Long axon and many short dendrites |
INTERMEDIATE NEURONES | Transmit impulses BETWEEN neurones (e.g from sensory to motor) |
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