Nerve Fiber Quiz

Question 1

Name the different types of nerve fibers.

Answer 1

A–> alpha, beta, gamma, delta
B
sC
dC

Question 2

Name the fibers that are myelinated.

Answer 2

all except sC and dC;
A-alpha, beta, gamma, delta
B

Question 3

List the fibers in order from largest to smallest in diameter.

Answer 3

A-alpha, A-beta, A-gamma, A-delta, Beta, dC, sC (the last two are close)

A-a= 12-20 microns
A-b= 5-12 microns
A-g= 3-6 microns
A-d= 1-4 microns
B= <3 microns
sC= 0.3-1.3 microns
dC= 0.4-1.2 microns

Question 4

Name the function of the fiber listed below:

A-alpha

Answer 4

motor (efferent) and sensory (afferent) to skeletal muscle and joints

Question 5

Name the function of the fiber listed below:

A-beta

Answer 5

motor (efferent) and sensory (afferent) to skeletal muscle and joints

Question 6

Name the function of the fiber listed below:

A-gamma

Answer 6

motor (efferent) to muscle spindles

Question 7

Name the function of the fiber listed below:

A-delta

Answer 7

sensory (afferent)

Question 8

Name the function of the fiber listed below:

B

Answer 8

preganglionic autonomic neurons

Question 9

Name the function of the fiber listed below:

sC

Answer 9

postganglionic sympathetic neurons

Question 10

Name the function of the fiber listed below:

dC

Answer 10

afferent (sensory)

Question 11

Name the transmitted sensation for the fiber listed below:

A-alpha

Answer 11

muscle length, muscle force, proprioception (position sense), somatic motor neurons

Question 12

Name the transmitted sensation for the fiber listed below:

A-beta

Answer 12

proprioception (position sense), touch, pressure

Question 13

Name the transmitted sensation for the fiber listed below:

A-gamma

Answer 13

skeletal muscle tone–> because its function is muscle spindles

Question 14

Name the transmitted sensation for the fiber listed below:

A-delta

Answer 14

pain, temperature, and touch–> because function is sensory (afferent)

Question 15

Name the transmitted sensation for the fiber listed below:

B fibers

Answer 15

various autonomic functions–> function is preganglionic autonomic neurons

Question 16

Name the transmitted sensation for the fiber listed below:

sC

Answer 16

various autonomic functions–> function is postganglionic sympathetic neurons

Question 17

Name the transmitted sensation for the fiber listed below:

dC

Answer 17

various autonomic functions, pain, temperature, touch–> sensory (afferent)

Question 18

_________ efferents adjust skeletal muscle force and length.

Answer 18

A-alpha

Question 19

What fibers are responsible for proprioceptions?

Answer 19

A-alpha and A-beta sensory fibers

Question 20

What type of fiber carries sensations of throbbing pain and temperature?

Answer 20

dC fibers

Question 21

______ fibers carry sensations of sharp, prickling pain and temperature.

Answer 21

A-delta–> sensory (afferent)

Question 22

Sympathetic and parasympathetic preganglionic neurons are _______ fibers.

Answer 22

B fibers

Question 23

Postganglionic sympathetic neurons are _____ fibers.

Answer 23

sC fibers

Question 24

_______ nerves conduct action potentials at greater velocities than ______ nerves.

Answer 24

myelinated vs unmyelinated

Question 25

T/F? The larger diameter nerve fibers conduct action potentials at greater velocities than smaller diameters.

Answer 25

TRUE

Question 26

Neurotransmitter for A-delta?

Answer 26

glutamate

Question 27

The neurotransmitter for A-delta, _____________, binds to _________ and ________ receptors on the postsynaptic membrane.

Answer 27

glutamate; AMPA and NMDA

Question 28

Neurotransmitter for C fibers?

Answer 28

substance P

Question 29

The neurotransmitter for C-fibers, ____________, binds to __________ receptors on the postsynaptic membrane.

Answer 29

substance P; NK-1