Nervous
System
Nervous System
• How did our nervous system work in
the Impulse Activity we just
completed?
– We sensed the touch.
– A message was sent to our brain.
– Our brain sent a message to our muscles.
– Our muscles squeezed the hand.
Organs of the Nervous System
Brain= uses information it receives from
nerve impulses to coordinate actions
Organs of the Nervous System
Nerves= carry messages
throughout the
body
Organs of the Nervous System
Spinal Cord= Central
communication system.
– Nerve center
– Messages are sent to
the brain through the
spinal cord.
– Exception: Reflexes
skip the spinal cord and
go straight to the brain.
Functions of the Nervous System
Functions include:
– Control center
– Communication
network
– Coordinates all
actions and reactions
– Send messages as
electrical impulses
Functions of the Nervous System
Functions include:
– Allows us to
• Think
• Evaluate
• Remember
Functions of the Nervous System
Functions include:
1. Sensory Input- Senses
2.
3.
send messages to the
brain.
Integration- The brain
interprets and
translates.
Motor Output- The
brain sends messages
to body.
Functions of the Nervous System
Functions include:
– Central Nervous
System- Maintains
homeostasis by
regulating vital body
functions such as
breathing, heart rate,
hormones, etc.
Functions of the Nervous System
Functions include:
– Peripheral
Nervous System• Sensory Neurons- Carry
•
information toward the
central nervous system
Motor Neurons- Send
impulses away from the
central nervous system