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

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