Download Nervous System

Nervous System
Axons
Take information away from the cell body
Dendrites
Bring information to the cell body
• Sensory (or afferent) neurons: send
information from sensory receptors (e.g.,
in skin, eyes, nose, tongue, ears)
TOWARD the central nervous system.
• Motor (or efferent) neurons: send
information AWAY from the central
nervous system to muscles or glands
• Interneurons: send information between
sensory neurons and motor neurons. Most
interneurons are located in the central
nervous system.
Divisions of the Nervous System
• Central Nervous System- Consists of brain
and spinal cord. (Interneurons)
• Peripheral Nervous System- Consists of
series of nerve cells that connect the brain
and spinal cord to your limbs and organs.
(Sensory and Motor neurons)
Reflex
• With a reflex, the signal started in your
peripheral nervous system travels to your
spinal cord and back to your muscles,
causing you to jerk your hand or foot back
quickly. This is unlike other nerve actions
in which the signal travels from your
sensory neurons, to your spine, to your
brain, and back to your muscles.