BIOL373 Study Guide - Midterm Guide: Lamellar Corpuscle, Postcentral Gyrus, Dorsal Root Ganglion

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Unit 03 – Sensory Systems: Part 1

Special senses Somatic Senses
 
 
 
 
 

Somatic Stimuli Visceral Stimuli
 
 !"
#"

$!%
&%
!'
(!
Sensory Pathways
)!!*
+ )
*
,-.
! /)00
12*
!(
2
!
2


3
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Sensory Receptors Vary in Complexity
Receptor Function
'4-
# 
# !1


# +5-
!-

# !-
.
# +!1



# 
o
Receptors Can be Grouped According to Type of Stimulus
# 
o
o$(11-11
# 
o)*1)*1-1
1
o
# 
o!
# 
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o!
Signal Transduction  Graded Potentials
# 
o!5
o
+)-0*
o
!!
o!
&
# 

o -
o78%(!489
o7:(!;89
# )*<
Sensory Neurons have Receptive Fields
# --!
5
o+8!=
o8&!!
# ,5.54
o')*
5
o)*
+!!>
# +->!>!5
o!

Receptive Fields for 1st Sensory Neurons
Often Overlap
# --

# -5!

o->
# =!
o'/

o 
o 
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Convergence  No Two-Point Discrimination
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