The Structure of Neurones Flashcards
neurones can be…
finish the sentence
very long
the cell body of a motor neurone is in…
finish the sentence
the CNS at one end of the fibre
the cell body of a motor neurone has fine cytoplasmic extentions
what are they called?
dendrons
dendrons form finer extentions
what are they called?
dendrites
the junctions that motor neurones form with other neurones are called…
finish the sentence
synapses
one dendron is much longer than the others
what is it called?
axon
the axon carries impulses to…
finish the sentence
the effector organ
at it’s end, the axon divides into many…
finish the sentence
nerve endings
the nerve endings (at the end of the axon) connect with a muscle at a sort of synapse called a…
finish the sentence
neuromuscular junction
the axon is covered in a sheath of fatty material called a…
finish the sentence
myelin sheath
what is the purpose of the myelin sheath?
the myelin sheath __________ ____ ______, prevents ‘______ __________’ with other axons, and ______ __ ___ __________ __ ________.
fill in the blanks
the myelin sheath insulates the axon, prevents ‘short circuts’ with other axons, and speeds up th conduction of impulses.
the myelin sheath is formed by…
finish the sentence
the membranes of cells that wrap around the axon.
a sensory neurone’s cell body is located…
finish the sentence
on a side branch of the fibre just outside the CNS
the fibre from the sensory receptor to the cell body (of a sensory neurone) is a…
finish the sentence
dendron
the fibre from the cell body (of a sensory neurone) to the CNS is a…
finish the sentence
short axon
