BIOL 3204(Oklahoma State University-Main Campus)
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1/18
,4/17/26, 10:36 PM Physiology Exam 2
Are the following axon classes ordered from largest to smallest, or smallest
to largest?
- A-alpha
- A-beta
- A-gamma
- A-delta
-B
-C
largest to smallest diameter
Are the following axon classes ordered from slowest to fastest, or fastest to
slowest?
- A-alpha
- A-beta
- A-gamma
- A-delta
-B
-C
fastest to slowest
2/18
, 4/17/26, 10:36 PM Physiology Exam 2
Of the following fibers, which has the lowest threshold of excitability?
which has the highest?
- A-gamma
- A-beta
- A-delta
-C
what does this mean for when they will produce an action
potential (AP) A-beta has lowest threshold (most sensitive)
- produce AP first
C has highest threshold
- produce AP last
What type of sensations do Group IV (Type C) sensory axons send to spinal
cord?
deep, dull, diffuse (not localized) muscle pain sensation
Which axon types transmit sensations of pain & temperature to CNS?
A-delta & C
Which axons innervate the muscle spindle?
Group Ia and II (Sensory A-alpha and A-
beta) A-gamma (motor)
3/18