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Histology > Exam 2 - Sensory Receptors > Flashcards

Exam 2 - Sensory Receptors Flashcards

1
Q

What is a sensory receptor?

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 somatic sensory receptors located?

A

skin, muscles, and tendon

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3
Q

What type of neurons are in somatic sensory receptors?

A

unipolar neurons

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4
Q

What is the function of the terminal end of primary sensory neurons?

A
  • form free nerve endings
  • innervates specialized cells
  • encapsulated by cells or connective tissue
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5
Q

What is the structure of a free nerve ending?

A

naked axons

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6
Q

Where is the free nerve ending located?

A

in the epidermis

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7
Q

What is the function of the free nerve ending?

A 
sense pain (nociceptor)
Sense temperature change (thermoreceptor)
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8
Q

What is the structure of a hail follicle terminal?

A

naked axons

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9
Q

What is the location of the hair follicle terminal?

A

wraps around the hair follicle

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10
Q

What is the function of the hair follicle terminal?

A

touch- mechanoreceptor

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11
Q

What is the structure of a merkel’s corpuscle?

A

merken cell + axon terminal

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12
Q

What is the location of a merkel’s corpuscle?

A

located at the base of the epidermis

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13
Q

What is the function of Merkel’s corpuscle?

A

touch and vibration (mechanoreceptor)

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14
Q

Where is the Meissner’s corpuscle located?

A

in the dermal papilla

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15
Q

What is the function of the Meissner’s corpuscle?

A

touch and vibration less than 100 Hz (mechanoreceptor)

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16
Q

What is Meissner’s corpuscle encapsulated by?

A

cells

17
Q

What is Pacinian corpuscle encapsulated by?

A

many layers of cells

18
Q

Where is the Pacinian corpuscle located?

A

deep in the dermis

19
Q

What is the function of the Pacinian corpuscle?

A

vibration more than 100 Hz (mechanoreceptor)

20
Q

What is a muscle spindle made up of?

A

intrafusal muscle fibers, sensory fibers, and connective tissue capsules

21
Q

What is the function of the muscle spindle?

A

proprioceptor

22
Q

What is the golgi-tendon organ made up of?

A

collagen fibers, sensory axons, and connective tissue capsules

23
Q

What are the functions of the golgi-tendon organ?

A

mechanoreceptor and proprioceptor

Histology (36 decks)

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