Download THE NERVOUS SYSTEM AND ENDOCRINE SYSTEM

THE NERVOUS SYSTEM
AND
ENDOCRINE SYSTEM
NERVOUS SYSTEM
DIVISIONS OF NERVOUS SYSTEM
Central
Peripheral
„ Contains the brain and
„ Sensory and motor
the spinal cord
„ Communicates
information to the rest
of the body through
the peripheral nervous
system
neurons throughout
the rest of the body
„ Takes information to
and from the CNS to
the extremities
DIVISIONS OF THE PNS
Autonomic
Somatic
„ Takes care of “automatic”
„ Controls voluntary
processes such as
breathing, heart rate,
muscles and glands
„ Cannot control this
„ Autonomic=automatic
movement of the muscles
„ Also known as the skeletal
nervous system
„ Somatic=SO Much
Control
AUTONOMIC NERVOUS SYSTEM
Sympathetic
Parasympathetic
„ Deals with arousal
„ Deals with calming
„ When something is exciting,
„ After something exciting
the sympathetic nervous
system brings you up
„ Increases heart rate,
breathing, dilates pupils
„ Sympathetic=you feel for
someone, your heart rate
increases
happens, the parasympathetic
nervous system brings you
back down
„ Slows heart rate, stimulates
digestion, contracts bladder
„ Parasympathetic=parachute
bringing you down
AUTONOMIC NERVOUS SYSTEM
„ Sympathetic and parasympathetic nervous systems work in
an opponent process system
„  They work in opposite of one another—as one is working, the other
cannot work
„ Work together to produce homeostasis (balance in the body)
NEURAL NETWORKS
„ Neurons work together
in neural networks
„  Neurons who have similar
functions all cluster in similar
areas and work together
„  Works and improves by making
more and better connections
„ The more you do
something, the better you
become at it
„  Neurons that fire together, wire
together
REFLEXES
„ Reflexes are our bodies’
automatic responses to stimuli
Sensory Neurons
Gather Info
„  We don’t feel it and we can’t make
a decision about it
Brain Processes
„ Reflexes occur through the
spinal cord
„  You would move your hand from
the flame, even if you had no head
Motor Neurons React
„  Only register pain after the info
has reached your brain
Interneurons speed the
reflex arc along
ENDOCRINE SYSTEM
„ The slow messenger of the body
„ Messages, in the form of
hormones, take longer than NTs
because they travel through the
bloodstream
„ Pituitary gland is the “master”
gland
„  Tells everyone else what to do…like
a boss
„ Adrenal glands release
epinephrine and norepinephrine