Lecture 1

Question 1

Type 1a or Aalpha fibers are what calssification/ use?

Answer 1

These are myelinated from annilospiral endings innervating muscle spindles.

Question 2

What do type IB or Aalpha fibers innervate? Are they myelinated?

Answer 2

These are myelinated and innervate the Golgi tendon organs.

Question 3

What role do A alpha fibers play in the cerebellum?

Answer 3

These guys return infromation from the muscles allowing for proprioception and determination of where the body is in space.

Question 4

What Role do the A alpha fibers play in the dorsal column pathways?

Answer 4

These relay fine detailed discrimitive touch including flutter, and vibratory sense.

Question 5

What responsibility do Type II or AB fibers play?

Are they myelinated?

Answer 5

These are myelinated fibers that are formed from flower spray endings innervating muscle spindles.

These are cutaneous tactile receptors.

Question 6

What responsibility do Type III or Adelta fibers have?

Are these myelinated?

Answer 6

These receptors are lightly myelinated and relay pain, temperature, and crude touch.

these fibers also relay sharp, well-localized pain.

Question 7

what are Type IV or C fibers responsible for?

Are they myelinated?

Answer 7

These are unmyelinated fibers that relay dull, poorly localized pain and temperature.

Question 8

What function do extero receptors have?

Answer 8

These receptors are close to the body surface and respond to sensory stimuli from the environment.

Thin: Smell, sight, gustatory, auditory, tactile, temperature, flutter/vibration.

Question 9

What classifications do Exteroreceptors have?

Answer 9

Classified as either teloreceptors or contact receptors.

Question 10

What stimuli do teloreceptors respond to?

Answer 10

Respond to stimulus from a distance not requiring contact.

Examples would be light and sound.

Question 11

What stimuli do contact receptors respond to?

Answer 11

Require contact!

Touch, pressure, pain, temperature, chemicals (olfactory gustatory)!

Question 12

Chemo receptors and baroreceptors are examples what what broad category of receptors?

Answer 12

Interoreceptors!

Question 13

What two types of receptors are involved in making up Noci receptors?

Answer 13

Type Adelta (Lightly myelinated)
and
Type C fibers (unmyelinated)

Question 14

What receptor types make up the mechanosensitive nocireceptors?

Answer 14

Alpha delta fibers responding to excessive mechanical stimulation or tissue injury.

Question 15

What receptor types make up the temeprature-sensitive nocioreceptors?

Answer 15

Terminals of alphadelta and C fibers

which respond to intese heat or cold.

Question 16

What type of fibers make up polymodal nocireceptors and what do they do?

Answer 16

Terminals of C fibers and these act by responding to various noxious stimuli.

Question 17

Pruriceptors work primarily through what type of receptor?

Answer 17

Work through Type C fibers responds to histamine producing an itchy sensation.

Question 18

Which two receptor types make up Thermoreceptors?

Answer 18

Adelta and C fibers

Question 19

Cold receptors encompass what receptor type?

Answer 19

ADelta fibers.

Question 20

Warmth receptors use what free nerve ending fiber type?

Answer 20

These use Warmth receptors and detect increase in temeprature.

Question 21

What are the three nonencapsulated mechanoreceptor types?

Answer 21

Free nerve endings
Peritrichial nerve endings
And
Tactile receptors

Question 22

What nerve fibers make up the Free nerve endings in the nonencapsulated mechanoreceptor category?

Answer 22

Adelta and C fibers

Respond to touch pressur pain and temperature.

Question 23

What fibers compose the Peritrichial nerve endings?

Answer 23

AB fibers.

Question 24

What fibers compose the tactile receptors/merkel discs?

Answer 24

AB

Question 25

What function do Merkel discs have?

Where can these be found?

Answer 25

Respond to fine detailed touch sensation (Shape, texture, edges)

Found in the lower epidermis and upper dermis.