Peripheral Nerve Endings

Front 1

Voluntary Motor Endings are found where?

Back 1

Skeletal muscle

Front 2

Autonomic Motor Endings are found where? Hint 3 places

Back 2

smooth muscle, cardiac muscle and glands

Front 3

Afferent carries impulses.....

Back 3

towards the central nervous system

Front 4

Efferent carries impulses.....

Back 4

away from the central nervous system

Front 5

A key chemical in neurons (nerve cells) that acts as a neurotransmitter and carries information across the synaptic cleft is what?

Back 5

Acetylcholine

Front 6

Autonomic axons contain clusters of what kind of vesicles along the course of the fiber (en passant) or in terminal boutons.

Back 6

clusters of synaptic vesicles

Front 7

Adrenergic means what and is part of the sympathetic or parasympathetic nervous system?

Back 7

liberating or activated by adrenaline or a substance like adrenaline.
They part of the sympathetic nervous system

Front 8

Afferent (sensory) axons in peripheral nerves are of three classes and have a variety of kinds of endings. Name the 3 kinds, their size, and if they are myelinated

Back 8

A-β – myelinated of a medium size
A-δ – small and thinly myelinated
C fibers are very small, unmyelinated and conduct very slowly

Front 9

The 4 types of sensory endings are...

Back 9

Free (bare) endings
Encapsulated endings
Rapidly Adapting (Dynamic)
Slowly Adapting (Static)

Front 10

These nerve endings end among epithelial cells reaching the stratum granulosum and in adjacent connective tissue

Back 10

Bare nerve endings

Front 11

In relation to bare nerve endings and speed
A-δ fibers have
C fibers have

Back 11

A-δ fibers have fast and intermediate adapting endings
C fibers have slowly adapting endings

Front 12

The 4 Sensory functions of bare nerve endings include

Back 12

Nociception – painful tissue injury conducted by C fibers are slowly adapting

Thermal hot and cold

Mechanical – around hair follicles

Itching

Front 13

Capsule of encapsulated nerve endings is called what

Back 13

perineurium

Front 14

What type of fibers are part of the endoneurium

Back 14

Collagen

Front 15

perineural cells, Schwann cells and axons are surrounded by what?

Back 15

Basal laminae

Front 16

The composition of fluid in nerves and encapsulated nerve endings is controlled by ------- epithelium

Back 16

perineural

Front 17

Ruffini Endings are an example of bare or encapsulated nerve endings?

Back 17

encapsulated

Front 18

Ruffini receptors are located where?

Back 18

in the dermis and subcutaneous tissues of thick skin.

Front 19

Ruffini receptors are what shape and how are they oriented?

Back 19

They are spindle-shaped and oriented parallel to the surface so that they are sensitive to stretch.

Front 20

Ruffini receptors are the primary mechanoreceptors of the ------- ligament.

Back 20

periodontal

Front 21

Ruffini receptors are characterized as....

Back 21

They are characterized as low-threshold, slowly adapting, type II mechanoreceptors

Front 22

The inner core of Pacinian Corpuscles consists of a centrally placed bare or encapsulated ending?

Back 22

a centrally-placed bare ending of an A-beta myelinated fiber surrounded by a gelatinous material encapsulated by several layers of Schwann cells.

Front 23

Outer lamellae of a Pacinian Corpuscle consist of -------- cells and connective tissue.

Back 23

endoneural

Front 24

Pacinian Corpuscles are slowly adapting endings sensitive to pressure and vibration. T or F

Back 24

F They are RAPIDLY adapting endings sensitive to pressure and vibration.

Front 25

Meissner’s Corpuscle are located where

Back 25

in dermal papillae of areas sensitive to light touch – fingertips, palms, soles, lips tongue, face and genitals

Front 26

Meissner's Corpuscles are supplied by A-beta, A-delta, or C axons?

Back 26

Supplied by a single A-beta axon

Front 27

Meissner's Corpuscles are encapsulated by --------- cells and ------- cells

Back 27

perineural , Schwann

Front 28

Meissner's Corpuscles are rapidly adapting they are sensitive to .....

Back 28

light touch and vibration

Front 29

they innervate extrafusal muscle fibers of skeletal muscle and are directly responsible for initiating their contraction.

Back 29

Alpha motor neurons (α-MNs)

Front 30

They regulate the gain of the stretch reflex by adjusting the level of tension in the intrafusal muscle fibers of the muscle spindle.

Back 30

Gamma motoneurons (γ-motoneurons): Gamma-motoneurons

Front 31

Cholinergic means what, and is part of the Parasympathetic or Sympathetic nervous system?

Back 31

liberating, activated by, or involving acetylcholine.
Parasympathetic nervous system

Front 32

Does the parasympathetic or sympathetic nervous system kick in when you are being attacked by an angry bear?

Back 32

It is the sympathetic system (it's sympathetic to your plight) that kicks in when being mauled.

Front 33

Where do you find Voluntary muscle endings?

Back 33

Skeletal Muscle.

Front 34

Where would you find Autonomic endings?

Back 34

Smooth muscle, cardiac muscle and Glands.

Front 35

What are Boutons?

Back 35

Where the axon terminates and attaches to the myfibril there are boutons.

Front 36

What are the 2 types of nerve endings in reference to conduction?

Back 36

Rapidly Adapting (Dynamic) and Slowly Adapting (static).

Front 37

What type (conduction) of nerve ending is a pain receptor?

Back 37

Slowly adapting.

Front 38

In what part of the skin would you find Bare nerve endings?

Back 38

Among epithelial cells reaching the statum granulosum and in adjacent connective tissue.

Front 39

True or False: there are generally just one size of Bare Nerve Endings.

Back 39

False: There are many different kinds with different sized axons.

Front 40

What is the nerve ending that looks like an onion?

Back 40

Pacinian Corpuscle.

Front 41

What are the layers of the Pacinian corpuscle composed of?

Back 41

Layers of Schwann cells.

Front 42

What are the two types of spindle fibers?

Back 42

Bag and Chain.