Nerves 1 Flashcards
AFFERENT
A sensory neurones that transmits signals TO CNS
EFFERENT
Sensory neurones that transmits information from CNS to periphery
Ascending tracts
Relay sensory information
Descending tracts
Relay motor information
Inter neuron
Creates a reflex arc between sensory and motor nerves
What 3 senses make up the afferent sensory nerves
Somatic, special, visceral
Give examples for each afferent sense
Somatic= skin and joints
Special= sight and hearing
Visceral=internal organs
Name the muscle connected to the efferent motor nerve in the somatic nervous system
Skeletal muscle
Name the 3 things connected to the efferent motor nerves in the autonomic nervous system
Cardiac muscle, smooth muscle, glands, enteric nervous system
List the cells in the central nervous system
Ventricle, ependymal cells, capillaries, astrocytes, microglial cells, oligodendrocytes, neurons
Ventricles
Filled with cerebral spinal fluid
Ependymal cells
Line ventricles
Capillaries
Blood vessels
Neurons
Transmission of information
Astrocyte
Type of glial cell, supports neurons and forms BBB
Microglial cell
Immune system within CNS, phagocytic
Oligodendrocytes
Myelinate multiple axons in the CNS
Schwann cells
Myelinate one axon in the PNS
Ependyma
Specialised epithelial cells that line the ventricular system
State the differences between Schwann cells and oligodendrocytes
S.cells have an outer neurolemma while oligo have outer plasma membrane
S.cells Myelinate single axons and have a pathway for axons to regenerate if injured
What protects the CNS
BBB, bone and the three membranes between brain and skull ( meninges)
What makes up the neuron
Dendrite, cell body (soma), axon hillock, axon
What is the main roles of the CNS
Memory, maintain body functions, control breathing and heartrate
What is the PNS important for
Transmit information between CNS and periphery
Detect peripheral information and send to brain for processing and send directions from brain to target
