A&P Chapter 23: Physiology of Sensation

Question 1

1. Which of the following is not a general sense?
   a. touch
   b. taste
   c. temperature
   d. pain

Answer 1

1. b. taste
   p. 520

Chapter 23: Physiology of Sensation

Question 2

2. Which of the following is not a true statement?
   a. Mechanoreceptors are activated by stimuli that “deform” the receptor.
   b. Taste and smell are examples of chemoreceptors.
   c. Photoreceptors respond to light stimuli.
   d. Thermoreceptors are activated by pressure.

Answer 2

2. d. Thermoreceptors are activated by pressure.
   p. 522

Chapter 23: Physiology of Sensation

Question 3

3. Which of the following structures is a disc-shaped nerve ending that is responsible for discerning light touch?
   a. Merkel disks
   b. Pacini corpuscles
   c. nociceptors
   d. Golgi tendon receptors

Answer 3

3. a. Merkel disks
   p. 526

Chapter 23: Physiology of Sensation

Question 4

4. Which of the following is not a proprioceptor?
   a. muscle spindle
   b. root hair plexus
   c. Golgi tendon receptor
   d. all of the above are proprioceptors

Answer 4

4. b. root hair plexus
   p. 527

Chapter 23: Physiology of Sensation

Question 5

5. Proprioceptors:
   a. function in relation to movements and body position.
   b. are superficial.
   c. are receptors for touch, pain, heat, and cold.
   d. are widely distributed throughout the skin.

Answer 5

5. a. function in relation to movements and body position.
   p. 526

Chapter 23: Physiology of Sensation

Question 6

6. ______ Mechanoreceptors are activated by a change in temperature.

True or False

Answer 6

6. False
   p. 522

Chapter 23: Physiology of Sensation

Question 7

7. ______ Free nerve endings are the simplest, most common, and most widely distributed sensory

True or False receptors.

Answer 7

7. True
   p. 522

Chapter 23: Physiology of Sensation

Question 8

8. ______ Somatic sense receptors located in muscles and joints are called visceroreceptors.

True or False

Answer 8

8. False
   p. 522

Chapter 23: Physiology of Sensation

Question 9

9. ______ Golgi tendon receptors are stimulated by excessive muscle contraction.

True or False

Answer 9

9. True
   p. 527

Chapter 23: Physiology of Sensation

Question 10

10. ______ Exteroceptors are often called cutaneous receptors because of their placement in the skin.

True or False

Answer 10

10. True
    p. 522

Chapter 23: Physiology of Sensation

Question 11

Applying What You Know!

26. Sean was 35 and started noticing some visual symptoms, frequent bouts of imbalance, and memory loss. He hesitates to go to the doctor because he has no pain and thinks that the symptoms will probably “go away soon.” What is wrong with Sean’s attitude towards these symptoms?

Answer 11

26. Brain tissue is unique and lacks the type of nociceptors that transmit sensation of pain. The brain is, therefore, incapable of sensing painful stimuli.

Chapter 23: Physiology of Sensation

Question 12

Applying What You Know!

27. Dick is a diabetic. He has been complaining of numbness in his feet. The doctor took great time and care to use cold and warm probes and methodically check areas of his feet repeatedly. Is this necessary?

Answer 12

27. Thermoreceptors are cold or warm. They are also not spread uniformly across the skin. Doctors use this technique to determine the extent and degree of numbness or sensitivity.

Chapter 23: Physiology of Sensation

Question 13

37. ____ found only in the eye
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 13

37. d. photoreceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 14

38. ____ activated by changes in temperature
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 14

38. c. thermoreceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 15

39. ____ concentrated in the hypothalamus
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 15

39. e. osmoreceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 16

40. ____ sensation is one of pain that may be caused by a toxic chemical
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 16

40. f. nociceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 17

41. ____ activated for sense of taste and smell
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 17

41. a. chemoreceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 18

42. ____ activated by stimuli that “deform” or change the position of the receptor
    a. chemoreceptors
    b. mechanoreceptors
    c. thermoreceptors
    d. photoreceptors
    e. osmoreceptors
    f. nociceptors

Answer 18

42. b. mechanoreceptors
    p. 522

Chapter 23: Physiology of Sensation

Question 19

43. ____ A receptor potential is a graded response that is graded to the strength of the stimulus.

True or False

Answer 19

43. True
    p. 521

Chapter 23: Physiology of Sensation

Question 20

44. ____ If we not only remain aware of a particular sensation over time but also interpret what that sensation means in a larger context, the process is called adaptation.

True or False

Answer 20

44. False
    p. 521

Chapter 23: Physiology of Sensation

Question 21

45. ____ Special sense receptors are grouped into localized areas.

True or False

Answer 21

45. True
    p. 521

Chapter 23: Physiology of Sensation

Question 22

46. ____ A procedure to determine the density and distribution of general sense receptors is known as the three-point discrimination test.

True or False

Answer 22

46. False
    p. 521

Chapter 23: Physiology of Sensation

Question 23

47. ____ Proprioception tells us at each moment the level of contraction and stretch in each of our skeletal muscles.

True or False

Answer 23

47. True
    p. 526

Chapter 23: Physiology of Sensation

Question 24

16. _____ mediates sensations of heat and cold
    a. light touch
    b. Pacini corpuscle
    c. Meissner corpuscle
    d. thermoreceptor
    e. proprioceptors
    f. brain
    g. itch
    h. histamine
    i. Krause end bulb
    j. tickle

Answer 24

16. d. thermoreceptor
    p. 525

Chapter 23: Physiology of Sensation

Question 25

17. _____ tactile sensation mediated by free nerve endings a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 25

17. g. itch p. 525 Chapter 23: Physiology of Sensation

Question 26

18. _____ Golgi tendon organs a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 26

18. e. proprioceptors pp. 527 and 528 Chapter 23: Physiology of Sensation

Question 27

19. _____ tactile stimulation of the skin by someone else a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 27

19. j. tickle p. 525 Chapter 23: Physiology of Sensation

Question 28

20. _____ mediated by a free nerve ending called a “Merkel disk” a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 28

20. a. light touch p. 526 Chapter 23: Physiology of Sensation

Question 29

21. _____ encapsulated tactile end organs a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 29

21. c. Meissner corpuscle p. 526 Chapter 23: Physiology of Sensation

Question 30

22. _____ variant of Meissner corpuscle that acts as a mechanoreceptor a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 30

22. i. Krause end bulb p. 526 Chapter 23: Physiology of Sensation

Question 31

23. _____ found in the deep dermis of the skin and responds quickly to sensations of deep pressure a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 31

23. b. Pacini corpuscle p. 526 Chapter 23: Physiology of Sensation

Question 32

24. _____ incapable of feeling painful stimuli a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 32

24. f. brain p. 523 Chapter 23: Physiology of Sensation

Question 33

25. _____ release occurs during allergic reaction a. light touch b. Pacini corpuscle c. Meissner corpuscle d. thermoreceptor e. proprioceptors f. brain g. itch h. histamine i. Krause end bulb j. tickle

Answer 33

25. h. histamine p. 525 Chapter 23: Physiology of Sensation