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39 terms

nervous system (1)

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master communicator and command center of the body
nervous system
nervous system
responsible for everything, every thought, every emotion, every movement, and every heartbeat
sensory input
monitors what's going on both inside and outside the body (includes all hearing, seeing, pain etc.)
integration
interprets information from the sensory input and decides what to do
motor output
response in the form of messages sent to muscles, organs, or glands
receptors in your hand send a message to the brain that the stove is hot
sensory input
your brain decides that's a bad thing
integration
your brain sends a message to your muscles to pull away
motor output
neurons
functional units of the nervous system
generates and carry impulses
neurons
supporting cells
everything else
separate and protect neurons, provide support, acts as phagocytes, and help in regulation
supporting cells
neurons and supporting cells
two basic types of cells
sensory input and integration and motor output
three main functions of the nervous system
central nervous system and peripheral nervous system
two principal divisions
central nervous system
consists of the brain and spinal cord
responsible for integrating, processing and coordinating sensory data and motor commands
central nervous system
command and control center
central nervous system
responsible for higher functions-intelligence, memory, learning, and emotions
central nervous system
peripheral
off to the side
everything except the brain and spinal cord
peripheral nervous system
peripheral nervous system
provides all communication between the brain, spinal cord and the rest of the body
afferent and efferent
two functional divisions of the peripheral nervous system
afferent
toward
division that carries sensory information from the receptors of the body to the central nervous system
afferent
afferent
receptors detect changes in the the environment--eyes, ears, touch, pain, heat, cold, etc.
efferent
away
division that carries motor information from the central nervous system to the body
efferent
targets
effectors
targets/effectors
make something happen (organs, muscles, glands)
somatic and autonomic
two parts of the efferent division
controls skeletal muscles
somatic
somatic
voluntary and involuntary (reflexes)
autonomic
visceral motor system
controls cardiac and smooth muscle, organs, and glands
autonomic
parasympathetic
generally slows things down (heart rate)
sympathetic
generally speeds things up
entric
controls activity within the digestive system
parasympathetic, sympathetic, enteric
sections of autonomic