MIDTERMS - NERVE FIBERS

Question 1

What are the collection of neuronal processes surrounded by connective tissues

Answer 1

Nerve Fibers

Question 2

Nerve fibers maybe covered by?

Answer 2

Myelin Sheath

Question 3

What do you call the thin, delicate reticular connective tissue that surrounds the myelin sheath?

Answer 3

Sheath of Henle

Question 4

What do you call the thin fibrous sheath surrounding the Sheath of Henle?

Answer 4

Endoneurium

Question 5

A collection of nerve fibers form nerve fascicles which is covered by?

Answer 5

Perineurium

Question 5

Nerve fibers consist of an axon and sheaths ____________ origin whether in the CNS or PNS

Answer 5

Ectodermal

Question 6

FILL IN THE BLANKS:

Cellular sheath in the CNS is _______ with or without myelin; in the PNS is _______________(Sheath of
Schwann) with or without myelin

Answer 6

a.) Glia
b.) Neurolemma

Question 7

True or False:

All peripheral axons are enclose by Sheath of Schwann cells (Neurolemma)

Answer 7

TRUE

Question 8

What are the 3 types of nerve fibers based on diameter?

Answer 8

1. Group A fibers
2. Group B fibers
3. Group C fibers

Question 9

What group fiber are large fibers that conduct at 15 to 100 m/sec (motor and sensory fibers)?

Answer 9

Group A fibers

Question 9

What group fiber conduct impulses at 3 to 14m/sec (mainly visceral sensory fibers)?

Answer 9

Group B fibers

Question 10

What group fiber are small, unmyelinated fibers conducting at 0.5 to 2 m/sec (autonomic and
some sensory fibers)?

Answer 10

Group C fibers

Question 11

What functional classification of nerve fibers are spinothalamic tract and spinocerebellar tract?

Answer 11

Afferent pathway

Question 12

What functional classification of nerve fibers are cortico-bulbar tract and cortico-spinal tract?

Answer 12

Efferent Pathway

Question 13

Fill in the blanks:

Sympathetic or adrenergic nerves – stimulation leads to the liberation of the substance ___.

Parasympathetic or Cholinergic nerves – stimulation leads to liberation of a substance ____.

Answer 13

NE

Ach (Acetylcholine)

Question 14

What are the 5 receptor organs?

Answer 14

Meissner’s corpuscle
Ruffini’s end organ
End bulb of Krause
Pacinian Corpuscle
Golgi Mazzoni

Question 15

What receptor organ is responsible for touch found in finger tips, lips, palms, soles, nipple and conjunctiva?

Answer 15

Meissner’s corpuscle

Question 16

What receptor organ is responsible for heat sensation found in subcutaneous tissue finger tips and joint capsule?

Answer 16

Ruffini’s end organ

Question 17

What receptor organ is responsible for sensory organs found in the conjunctiva and external genitalia?

Answer 17

End bulb of Krause

Question 18

What receptor organ mediate deep pressure and found hand, foot, palms, soles, peritoneum, pleura, mesenteries, penis, clitoris, urethra, nipple, breast and pancreas?

Answer 18

Pacinian Corpuscle

Question 19

What receptor organ is responsible for deep pressure?

Answer 19

Golgi Mazzoni

Question 20

Fill in the blanks:

__________________- blood supply to the nerve;

__________________ - innervates the nerve

Answer 20

a.) Vasa Nervorum

b.) Nervi Nervorum

Question 21

What is a brain disorder that happens when certain nerve cells in your brain misfire?

Answer 21

Epilepsy

Question 22

What disorder affects the brain and spinal cord?

Answer 22

Multiple sclerosis