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Histo (VM1 Fall) > Exam 2 - Lecture 19 (Sensory Receptors) > Flashcards

Exam 2 - Lecture 19 (Sensory Receptors) Flashcards

1
Q

What are sensory receptors?

A

Receptors that detect changes in thermal, mechanical, or chemical stimuli applied to the surface or interior of the body.

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2
Q

Where are 3 places where we can find somatic sensory receptors?

A
  1. Skin
  2. Muscles
  3. Tendon
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3
Q

Where in the CNS are sensory receptors located?

A

Dorsal horn/dorsal root ganglion

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4
Q

What is the classification of dorsal root ganglion neurons?

A

Unipolar

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5
Q

How does the CNS know the specific stimulus?

A

Sensory receptors

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6
Q

Sensory modalities are _____ to certain sensory receptors.

A

specific

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7
Q

On what part of the neuron are somatic sensory receptors found?

A

Terminal end of the primary sensory neurons

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8
Q

DRG neurons are _____ neurons

A

primary sensory

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9
Q

What are the 7 types of somatic sensory receptors?

A
  1. Free nerve ending
  2. Hair follicle terminal
  3. Merkel’s corpuscle
  4. Meissner’s corpuscle
  5. Pacinian corpuscle
  6. Golgi-tendon organ
  7. Muscle spindle
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10
Q

What is the modality for FNE?

A

pain, temperature

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11
Q

What is the modality for hair follicle terminals?

A

touch

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12
Q

What is the modality for Merkel’s corpuscle?

A

touch, pressure

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13
Q

What is the modality for Meissner’s corpuscle?

A

touch, vibration (<100 Hz)

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14
Q

What is the modality of Pacinian corpuscle?

A

Vibration (>100 Hz)

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15
Q

What is the modality of Golgi-tendon organ?

A

Muscle tension, proproception

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16
Q

What is the modality of muscle spindle?

A

Proprioception

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17
Q

What is the morphology of FNE?

A

free nerve ending (“naked”)

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18
Q

What is the morphology of hair follicle terminal?

A

free nerve ending (“naked”)

19
Q

What is the morphology of Merkel’s corpuscle?

A

Merkel cell + axon terminal

20
Q

What is the morphology of Meissner’s corpuscle?

A

Encapsulated by cells

21
Q

What is the morphology of Pacinian corpuscle?

A

LARGE, encapsulated by many layers of cells

22
Q

What is the morphology of muscle spindle?

A

Intrafusal muscle fibers, sensory fibers, c.t. capsules

23
Q

What is the morphology of Golgi-tendon organ?

A

Collagen fibers, sensory axons, c.t. capsule

24
Q

Where are FNEs located?

A

epidermis

25
Q

Where are hair follicle terminals located?

A

skin (dermis near base of follicle)

26
Q

Where are Merkel’s corpuscles located?

A

Skin (basal layer of epidermis)

27
Q

Where are Meissner’s corpuscles located?

A

Skin (tip of dermal papillae)

28
Q

Where are Pacinian corpuscles located?

A

Skin (deep in dermis of glabrous and nonglabrous skin)

29
Q

Where are muscle spindles located?

A

skeletal muscle (perimysium)

30
Q

Where are Golgi-tendon organs located?

A

Origins and insertions of skeletal muscle fibers into the tendons of skeletal muscle

31
Q

What is the receptor for FNE (pain) called?

A

Nociceptor

32
Q

What is the receptor for FNE (temp) called?

A

thermoreceptor

33
Q

What is the receptor for hair follicle terminals (touch) called?

A

mechanoreceptor

34
Q

What is the receptor for Merkel’s corpuscle (touch and pressure) called?

A

mechanoreceptor

35
Q

What is the receptor for Meissner’s corpuscle (touch and vibration) called?

A

mechanoreceptor

36
Q

What is the receptor for Pacinian corpuscles (vibration) called?

A

mechanoreceptor

37
Q

What is the receptor for Muscle spindles (proprioception) called?

A

proprioceptor

38
Q

What is the receptor for Golgi-tendon organ (muscle tension) called?

A

mechanoreceptor

39
Q

What is the receptor for Golgi-tendon organ (proprioception) called?

A

proprioceptor

40
Q

Sensory receptors are at terminal ends of _____.

A

Sensory axons

41
Q

Sensory modality is _____.

A

Receptor specific

42
Q

Sensory neurons carry signals to the _____.

A

CNS

43
Q

What is another name for DRG neurons?

A

primary sensory neurons

44
Q

What is the normal RMP on a mammalian axon?

A

-65 mV

Histo (VM1 Fall) (27 decks)

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