stimulus
anything in the environment that causes a response
response
action to a stimulus
reflex
an automatic body response to harmful stimuli
neuron
a nerve cell
sensory neuron
carries message to the central nervous system
motor neuron
carries message away from central nervous system
interneuron
connects sensory and motor neurons
nerve
a bundle of neurons
impulse
message carried by nerve
cerebrum
memory, learning, senses, personality, motor activities
cerebellum
balance and muscle coordination
medulla/brain stem
breathing, heartbeat, reflexes
spinal cord
relays impulses between brain and body nerves
spinal nerves
relays impulses between CNS and body
endocrine system
glands that produce hormones
gland
organ that releases a hormone
hormone
chemical that controls a body function
target tissue
specific tissues affected by a hormone
pituitary
in the brain, master gland, controls others glands, produces growth hormone
thyroid
in the neck,makes thyroxin which controls body metabolism