Peripheral Nerve

Question 1

create myolien in the PNS

Answer 1

Schwann Cells

Question 2

Peripheral Nerves contains ______but no _______

Answer 2

axons, dendrites

Question 3

A nerve is usually made up from a variety of fascicles . Each fascicle is encased by ________.

Answer 3

perineurium

Question 4

Inside the fascicle are a group of axons bathed in __________

Answer 4

endoneurial fluid

Question 5

Each axon has an insulating lining of _____

Answer 5

myelin

Question 6

Between the fascicles is a fatty material called the________

Answer 6

interfascicular epineurium

Question 7

binds several fascicles into a nerve trunk

Answer 7

epineurium

Question 8

A peripheral nerve contains:

Answer 8

• axons
• Schwann cells (produce myelin)
• Support cells (produce fibrocollagenous tissue; spindle-shaped
• blood vessels

Question 9

Surrounds individual axons, Schwann cells and blood vessels

Answer 9

Endoneurium

Question 10

The endoneurium is composed mainly of reticular fibers (RF) synthesized by ___________

Answer 10

Schwann cells

Question 11

myelinated processes

Answer 11

white matter

Question 12

nerve cell bodies, dendrites, axon terminals, bundles of unmyelinated axons and neuroglia

Answer 12

Gray matter

Question 13

In the spinal cord = gray matter forms

Answer 13

an H-shaped inner core surrounded by white matter

Question 14

In the brain - a thin outer shell of _______ covers the surface & is found in clusters called nuclei inside the CNS

Answer 14

gray matter

Question 15

myleinate axons in the CNS

Answer 15

oligodendrocyte

Question 16

Types of receptors

Answer 16

• Mechanoreceptor
• Thermoreceptors
• Nociceptors
• Proprioceptors

(muscle spindles)

Question 17

Muscle Spindle

Answer 17

• encapsulated sensory receptor
• specialized stretch receptor

Question 18

non-encapsulated sensory receptors in the skin

Answer 18

• Epidermal free ending
• Merkel ending

Question 19

encapsulated sensory receptors in the skin

Answer 19

• Pacinian corpuscle
• Krause end bulb
• Meissner’s corpuscle
• Ruffini corpuscle

Question 20

Receptors for ATP, histamine, and bradykinin mediate painful sensations

Answer 20

pain-sensitive endings

Question 21

stimulates heat-sensitive Ca+ channels in these endings

Answer 21

Capsaicin

Vanilloid receptor, VR1 =

Transient receptor potential,

TRPV1

Question 22

Merkel’s Discs and Mechanoreception are found in which layer of the epithelium?

Answer 22

basal layer

touch receptors

Question 23

stimulates cold-sensitive Ca+ channels (Vanilloid receptors)

Answer 23

MENTHOL

Vanilloid receptor,

Transient receptor

potential,

TRPM8

Question 24

pressure receptors fast conducting bulb shaped receptors located deep in the dermis in the skin and also in various internal organs

Answer 24

pacinian corpuscle

sensitive to vibration

Question 25

Voluntary motor and sensory components

Answer 25

Somatic nervous system

Question 26

Involuntary control of viscera
Sympathetic system
“fight-or-flight; thoraco-lumbar
Parasympathetic system
“steady-state”; cranio-sacral

Answer 26

Autonomic nervous system

Question 27

Located in the border between dermis and epidermis, “cotton candy-like” structure surrounded by fibroblast and Schwann cells

Answer 27

Meissner’s Corpuscles

touch receptor

Question 28

Contains autonomic ganglion for contraction of smooth or cardiac muscle, stimulation or inhibition of glandular secretion

Answer 28

Autonomic motor neuron

Question 29

Nerves release angiogenic factors such as

Answer 29

VEGF (Vascular Endothelial Growth Factor)