Ch.10 Part B

Question 1

2) Why are there three semicircular canals.

Answer 1

2) The 3 planes Coronal sagittal and transverse

Question 2

3) What common visual defect would use a convex lens to correct it?

Answer 2

3) Hyperopia.

Question 3

4)why do we have a blind spot

Answer 3

4) There are no photoreceptors on the optic disc

Question 4

5)what special sense helps with orientation

Answer 4

5) Vision

Question 5

6)how do the semicircular canals generate action potentials

Answer 5

6) Fluid Moves when the cupola bends hair cells sending a signal

Question 6

7)what is the gravity sensor in the head

Answer 6

7) Otolith organ.

Question 7

8) what mechanoreceptor sense positions of joints/appendages

Answer 7

8) Proprioceptors.

Question 8

9)what is the difference between the optic dics the fovea centralists and the macula of the eye?

Answer 8

9) Optic disc- blind spot region where optic nerve and blood vessel leave the eye
fovea- region of sharpest vision
macula-the center of the visual field

Question 9

10)what is the function of accommodation ?

Answer 9

10) its the process by which the eye adjust the shape of the lens to keep object in focus

Question 10

11)what common visual defect is also known as farsightness

Answer 10

11) Hyperopia

Question 11

13)why do nocturnal animals need to have a tapedum

Answer 11

13) Increase reflection.

Question 12

14)what vestibular structures would tell you theater or not your head is upright

Answer 12

14) Otolith organ.

Question 13

15)what is the name of the hole in the middle of the iris ?

Answer 13

15) pupil

Question 14

16) what is the effect of tilting your head to the side on the structure within the otolith organs

Answer 14

16) The otoliths move due to gravity

Question 15

17)what structure provides information about movement and position in space

Answer 15

17)otolith

Question 16

18)what do sensory neurons produce when stimulated by hair cells

Answer 16

18) Action potential.

Question 17

19)which sensory cells would be most active at night and why

Answer 17

19) Rods.

Question 18

20)what is an area that has the highest concentration of cones for facial recognition and reading

Answer 18

20)fovea/macula.

Question 19

21)why do the crystals of the otolith organs move to the bottom of their chamber

Answer 19

21)due to gravity/ Heavy density.

Question 20

22)what common visual defect would use a concave lens to correct it?

Answer 20

22) Myopia

Question 21

23) mechanoreceptor included in equilibrium are incited in what three types of body information

Answer 21

23)Body balance position and movement

Question 22

24)what brain structure is a pathway for all incoming signals from the body

Answer 22

24)medulla

Question 23

25)what structures in the semicirculr canals move as the endolymph flows past them

Answer 23

25)cupula

Question 24

26)what structure do nocturnal animals have behind their retinas that reflect light

Answer 24

26)tapetum lucinium

Question 25

27)what structure associated with both hearing and equilibrium generate signals that are interpreted by sensory neurons as a stimulus

Answer 25

27) Hair cells.

Question 26

28)What vestibular structure contain fluid that does not move when you move your head ?

Answer 26

28)Semicircular canal

Question 27

29)what common visual defect is also known as near sightedness

Answer 27

29)myopia

Question 28

30)what do the semicircular canals sense

Answer 28

30) Rotation or equilibrium.

Question 29

31)which sensory cells are used to detect color and details

Answer 29

31) cones

Question 30

32)what is the function of the pupil

Answer 30

32) pupil limits light lens focuses light

Question 31

33)what Is the function of rods and cones in the retina

Answer 31

33) Rods- night vision shades of grey only

Cones- color and detail used for reading, facial recognition

Question 32

35)what is the difference between a convex and concave lens in terms of reasons for use and function

Answer 32

35) Convex- Ligament that shrivels in that produces the fat shape.
Concave- Ligaments stretch out, allowing light to go in.

Question 33

36)what common visual defect occurs when the focal point falls in front of the retina

Answer 33

36)myopia

Question 34

37)what brain structure contains behavior patterns like how to play a piano

Answer 34

37) Cerebellum.

Question 35

39)what brain structure is involved in making design based on sensory information

Answer 35

39) Cerebral Cortex

Question 36

40)what is the name of the action of the eye adjusting the shape of the lens?

Answer 36

40) convex lens

Question 37

41)what two actions cause the lens to flatten or thicken for accommodation

Answer 37

41) ciliary muscle contraction, ligament

Question 38

42)what common visual defect overs when the focal point falls behind the retina

Answer 38

42)hyperopia

Question 39

43)how are images projected onto the retina

Answer 39

43) image is upside down

Question 40

44)what are theme of the two types of sensory cells of the retina

Answer 40

44) rods and cones

Question 41

45)what result from a defect in one or more of the three types of cone

Answer 41

45)color blindness

Question 42

46)what is the primary visual pigment in the visual cells

Answer 42

46)opsin / rhodopsin

Question 43

47)how is the stimulus in vision so different the that for all other sensory cell

Answer 43

47) the more light that is being seen the less ACh is being released

Question 44

48)which sensory cells are used to detect shades of light dark and grey only

Answer 44

48) Rods

Question 45

49)which sensory cells would be most active during the day and why

Answer 45

49) cone cells there used for reading and facial recognition

Question 46

50) Which sensory cells would be most affected if you had all recessive genes for color blindness.

Answer 46

50) Cones

Question 47

51) What is the function of the melanin granules on the posterior surface of the retina.

Answer 47

51) Absorbs light. / Prevents reflection