THE STRUCTURE/FUNCTION OF NEURONES

Questão	Responda
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)

Resumo de Recurso

	Criado por ashiana121 mais de 8 anos atrás