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Nervous System CH.9 lecture 1 (input (sensory system, takes everything in…
Nervous System CH.9 lecture 1
monitors conditions and takes corrective action to keep everything run smoothly.
function
senses, brain, thinking, interacting with world
brain and spinal cord
control total nervous system
input
sensory system
takes everything in and brings it to nervous system
output
monitor system
carries out orders and tell muscles and glands how to respond
somatic nervous system
controls skeletal and voluntary muscles
motor system
somatic nervous system
controls skeletal muscle and voluntary muscle
autonomic nervous system
controls smooth and cardiac muscle in your organs
parasympathetic
deals with normal body function and maintaining homeostasis
sympathetic
controls "fight or flight"
CNS sends directions to organ to prepare for action (autonomic NS)
nervous tissue
made of neuroglia and neurons
schwann cells
make myelin for NS
satellite cells
support cells
glial cells
support lining, covering cavities, supporting and protecting structures.
4 types
astrocytes
metabolic and structural support cells that hold neurons and blood vessels together
microglia
remove debris and microbes
ependymal cells
cover and line cavities of NS
oligodendrocytes
hold nerve fibers together and make lipid insulation called myelin
neurons
Each part of neurons hold specific function
body
cell metabolism
dendrites
receive info from environment
axon terminal
where signal leaves cell
synapse
where axon terminal and receiving cell combine