section 29 4 nervous system n.
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Section 29-4 “Nervous System ”. Write everything that is underlined. KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information. Nervous?. Nervous doesn’t mean afraid or uncomfortable

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section 29 4 nervous system

Section 29-4“Nervous System”

Write everything that isunderlined


KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information.

  • Nervous doesn’t mean afraid or uncomfortable
  • It is just talking about the nerves which are strands of neurons or nerve cells
  • Think of it as Nerve-ous
how about interpret
How about interpret?
  • Definition of Interpret: to explain the meaning of
  • The Central Nervous System processes and makes sense of the information it’s given from your body
  • When someone pours water over your head how do you automatically know it’s water?
  • Your nervous system takes the info and “tells” your brain what’s going on
peripheral hard to say isn t it
Peripheral – hard to say isn’t it?
  • Peripheral means “outer edge”
  • Peripheral vision means seeing stuff behind you
i the nervous system s two parts work together
I. The nervous system’s two parts work together
  • The Central Nervous System (CNS) includes the brain, brain stem, and spinal cord.
  • The Peripheral Nervous System (PNS) includes four systems of nerves.
CNS (Central Nervous System)
  • PNS (Peripheral Nervous System)
The CNS and PNS pass signals between each other
  • Sensory receptor generates impulse
  • PNS passes impulse to CNS
  • CNS interprets impulse
  • CNS passes impulse to PNS
  • PNS stimulates a response
the cns processes information




medulla oblongata

The CNS processes information
  • The brain has three parts:
    • cerebrum controls thought, movement, emotion
    • cerebellum allows for balance
    • brain stem controls basic life functions



medulla oblongata

  • The brain stem has three parts:
  • midbrain controls some reflexes
  • pons regulates breathing
  • medulla oblongata controls heart function, swallowing, coughing


motor neurons

sensory neuron

  • sensory neuron sends impulse to spinal cord
  • spinal cord directs impulse to motor neuron
  • does not involve the brain
  • The spinal cord controls reflexes
ii the pns links the cns to muscles and other organs
II. The PNS links the CNS to muscles and other organs
  • The somatic nervous system regulates voluntary movements
  • The autonomic nervous system controls involuntary, functions
  • sympathetic nervous system: “fight or flight”
  • parasympathetic nervous system: calms the body, conserves energy