chapter 2 - nervous/endo/immune Flashcards
what is the main goal of the neuro, endo, and immune systems
preserve homeostasis
what is neuroimmunomodulation
constant interaction between the systems is needed to control coordination of behaviour
what % of neurons are in cerebellum and cerebral cortex
20% in cerebral cortex
80% in cerebellum
when does a synapse strengthen?
when 2 neurons on either side of the synapse are activated at the same time
functions of glial cells
support and nutrition
maintain homeostasis
make myelin
take part in signal transmission
what % of microglial cells are in brain
10-15% of all cells in the brain
functions of microglial cells
act as macrophage cells
- main form of immune defence in CNS
- protect brain from microbe invaders, demyelination, trauma, cancer/bad cells
when glial cells go wrong, its bad! what are some things that can happen?
brain inflammation
neurodegeneration (chronic pain)
alzheimers
parkinsons
myalgic encephalomyelitis (chronic fatigue syndrome)
what is the sensory division of nervous system called?
afferent division
what does the sensory division of the nervous system do
allows for communication back to CNS
what r the 2 branches of the motor division of nervous system
autonomic nervous system
somatic nervous system
what is the motor division of the nervous system also called
efferent division
how does feedback looping help us balance?
enables the brains motor control centres to correct the signals to the musscles
where are hormonal brain neurons found
brainstem and central region of brain
what does somatic nervous system do
responds to the external environment
sends info to the brain from the bodys sensory detectors
maintains homeostasis in external environment
