S1_L2: Cutaneous Receptors Flashcards
These provide input to nervous system and detect sensory stimuli such as touch, sound, light, pain, cold, and warmth
Cutaneous Receptors
TRUE OR FALSE: Mechanoreceptors detecting mechanical compression. It also detects the stretching of the receptor or of tissues adjacent to receptor.
A. Both statements are true
B. Both statements are false
C. Only the 1st statement is true
D. Only the 2nd statement is true
A. Both statements are true
The following statements are true, EXCEPT:
A. Joint has a low threshold for mechanoreceptors
B. Krause’s End-Bulb and Hair End Organ are examples of mechanoreceptors
C. Mechanoreceptors are able to detect stimuli such as touch, pressure, vibration, and sound from internal environments
D. All of the above
E. None of the above
A. Joint has a low threshold for mechanoreceptors
NOTE: It has a high threshold
Match the following sensations subserved by the kinds of mechanoreceptors.
- tickle
- velocity of touch
- changes on texture
- continuous touch of objects against skin
- pain
A. Free Nerve Ending
B. Meissner’s corpuscles
C. Merkel’s discs
- A
- C
- B
- C
- A
Match the following sensations subserved by the kinds of mechanoreceptors.
- constant indentation of the skin
- localized spatial sensations
- low frequency vibration
- light touch
- pressure
A. Free Nerve Ending
B. Meissner’s corpuscles
C. Merkel’s discs
- C
- B
- B
- A
- A
Match the following sensations subserved by the kinds of mechanoreceptors.
- heavy prolonged touch
- movement of objects on the surface of the body
- cold
- rapid local compression of tissues
- movement of any hair in the body
A. Hair End Organ
B. Ruffini’s end organ
C. Pacinian Corpuscles
D. Krause’s End-Bulb
- B
- A
- D
- C
- A
Match the following sensations subserved by the kinds of mechanoreceptors.
- tissue vibration
- initial contact with the body
- pressure signal
- perception of touch and pressure
- tension or stretch
A. Hair End Organ
B. Ruffini’s end organ
C. Pacinian Corpuscles
D. Krause’s End-Bulb
- C
- A
- B
- D
- B
Skin tolerates until _______ºC until it burns
45
TRUE OR FALSE: Free nerve endings can be stimulated mechanically, thermally, and chemically
True
The following statements are true about free nerve endings, EXCEPT:
A. able to detect itch sensations
B. able to detect temperature
C. found in the cornea and everywhere in the superficial layer of the skin
D. All of the above
E. None of the above
E. None of the above
TRUE OR FALSE: Meissner’s corpuscles are localized on the hairy areas of the skin. It is encapsulated in a myelin sheath and contain many branching nerve filaments within the capsule.
A. Both statements are true
B. Both statements are false
C. Only the 1st statement is true
D. Only the 2nd statement is true
D. Only the 2nd statement is true
NOTE: it is located in non0hairy areas such as the fingertips and lips
Meissner’s corpuscles are located in areas where one’s ability to discern (1)_______ of (2)_______ sensations is highly developed
- spatial locations
- touch
TRUE OR FALSE: Meissner’s corpuscles play an important role in discriminative touch and movement of objects over skin.
True
______ is a system of touch reading and writing for visually impaired persons in which raised dots represent the letters of the alphabet
Braille / Braille System
TRUE OR FALSE: Merkel’s discs have the same location as free nerve endings. It plays an important role in both two-point discrimination and localization of touch.
A. Both statements are true
B. Both statements are false
C. Only the 1st statement is true
D. Only the 2nd statement is true
D. Only the 2nd statement is true
NOTE: It has the same location as Meissner’s corpuscles, but is also present in skin with hair
Meissner’s corpuscles are (1)_______ adapting receptors, while Merkel’s discs
are (2)_______ adapting receptors
- rapid
- slow
The entire group of Merkel’s discs is innervated by a single large myelinated nerve fiber. Which nerve fiber is being referred?
type Aβ
Merkel discs are often grouped together in this receptor organ. This causes the epithelium at this point to protrude outward, thus creating a dome. What is the structure being referred?
Iggo Dome Receptor
Topic: Hair End Organ
At the base of each (1)_______, a (2)_______ is entwined.
- hair follicle
- free nerve ending
TRUE OR FALSE: Ruffini’s end organ can detect warmth.
True
To remember: Ruff-init
TRUE OR FALSE: Ruffini’s end organ are located in the deeper layers of skin. It is present in internal tissues such as joint capsules.
A. Both statements are true
B. Both statements are false
C. Only the 1st statement is true
D. Only the 2nd statement is true
A. Both statements are true
TRUE OR FALSE: Ruffini’s end organ also encapsulated in a myelin sheath. They are known to be fast adapting receptors.
A. Both statements are true
B. Both statements are false
C. Only the 1st statement is true
D. Only the 2nd statement is true
C. Only the 1st statement is true
The following statements are true about Pacinian Corpuscles, EXCEPT:
A. also respond to superficial pressure and slow vibration
B. located immediately beneath the skin
C. located deep fascial tissues such as tendons and joints
D. encapsulated in a myelin sheath
E. None of the above
A. also respond to superficial pressure and slow vibration
NOTE: it responds to deep pressure and fast vibration
Krause’s End-Bulb are located where?
dermis and conjunctiva of the eye