Quiz Flashcards
What is function of motor neurones
Produces response to sensory information (perception) to affect change
How is nervous system communication different to endocrine?
Faster
4 internal sensory neurones
Stretch receptor
Baroreceptor
Osmoreceptor
Chemoreceptors
Name 2 branches of autonomic NS and their main action
Sympathetic - fight flight
Parasympathetic- rest digest
What do motor neurones in enteric NS do?
Govern motility, secretions
What is grey matter made of
Cell bodies
What are the little branches at the receiving end of a neuron called?
Dendrites
What is main symptom of Bell’s palsy
Sudden facial paralysis
What group people most often affected by MS
Women 20-50
4 types of neuroglia found in CNS
Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
What do ependymal cells do
Make and circulate CSF
Which type neuroglia make up BBB
Astrocytes
Which neuroglia are phagocytic
Microglia
Function of myelin sheath
Insulate neurons - allows faster conduction of nerve impulses
Gaps between Schwann cells called
Nodes of ranvier
Can CNS nerves regenerate
No, glial cells inhibit growth
Describe conditions inside and outside a neurons at resting potential
Outside is rich in Na and Cl
Inside is rich in K and large negative ions
Membrane polarised -70mV
What happens during an action potential
Depolarisation - sodium channels open, sodium floods in
Repolarisation- potassium channels open and potassium floods out
Sodium and potassium are now on wrong side of membrane
