Download Axon = short Dendrite = long Axon = long or short Dendrite = short

Name: _________________________________
Page: 322-323
Date: ____________
BIOLOGY 12
NEURONS – TYPES AND PARTS
For the following diagram: 1) label the axons and dendrites on the lines provided; 2) colour the
three neurons different colours; and 3) include a key for the colours.
axon
KEY:
Sensory Neuron
Interneuron
Motor Neuron
dendrite
dendrite
axon
axon
dendrite
Bases of Comparison
Length of axon and
dendrite
Location
p. 329
Sensory Neuron
Axon = short
Dendrite =
long
Interneuron
Axon = long or
short
Dendrite =
short
-cell body and -entirely
within spinal
dendrite are
cord (CNS)
outside spinal
cord; cell body
located in
dorsal root
ganglia
-PNS
Motor Neuron
Axon = long
Dendrite =
short
-dendrites and
cell body are
located in
spinal cord;
axon is outside
of spinal cord
-PNS
Function
-detects
changes in the
internal and
external
environment
-takes
impulses
(messages)
from sensory
receptor to
CNS
-receives input
from sensory
neurons and
interneurons in
CNS, sums
them up and
sends them to
motorneuron
-takes
message away
from CNS to
EFFECTOR
(muscle fiber
or gland) which
carry out our
response to
environmental
changes