Karteikarten
THE STRUCTURE/FUNCTION OF NEURONES
Karten in diesem Stapel (9)
- 1CELL BODYContains a nucleus and large amounts of rough ER
Associated with the production of proteins and neurotransmitters - 2DENDRONSSmall extensions of the cell body which subdivide into dentrides (smaller extensions) which carry nerve impulses TOWARDS THE CELL BODY
- 3AXONA single long fibre that carries nerve impulses AWAY FROM THE CELL BODY
- 4SCHWANN CELLSSurround the axon, protecting it and providing electrical insulation
Carry out phagocytosis (removal of cell debris) and nerve regeneration - 5MYELIN SHEATHCovers the axon - made up of membranes of Schwann cells
Rich in a lipid called myelin
Myelinated neurones transmit impulses quicker than non-myelinated neurones - 6NODES OF RANVIERGaps between adjacent Schwann cells where there is NO MYELIN SHEATH
- 7SENSORY NEURONETransmit 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 - 8MOTOR NEURONESTransmit nerve impulses from an intermediate or sensory neurone to and EFFECTOR (gland/muscle)
Long axon and many short dendrites - 9INTERMEDIATE NEURONESTransmit impulses BETWEEN neurones
(e.g from sensory to motor)
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- A-Level A2 BIOLOGY Karteikarten am THE STRUCTURE/FUNCTION OF NEURONES , erstellt von ashiana121 am 01/03/2016.
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