Chapter 15 Flashcards
1
Q
Protects and shapes the eyeball; provides a sturdy anchoring site for extrinsic eye muscles.
A
A
2
Q
Blood vessels supply nutrition to all eye layers.
A
B
3
Q
Contains only cones; provides detailed color vision.
A
D
4
Q
Lacks photoreceptors; where optic nerve exits the eye.
A
E
5
Q
Consists of a pigmented layer and a neural layer.
A
C
6
Q
Pinna.
A
A
7
Q
Tympanic membrane.
A
E
8
Q
Stapes.
A
C
9
Q
Semicircular canals
A
B
10
Q
Cochlea.
A
D
11
Q
Balance organ.
A
B
12
Q
Houses organ of Corti.
A
D
13
Q
The sensory layer of the eye.
A
Retina
14
Q
The structure most responsible for focusing light rays that enter the eye.
A
Lens
15
Q
Helps maintain the intraocular pressure; located in the anterior part of the eye.
A
Aqueous humor
16
Q
Area of greatest visual acuity.
A
Fovea centralis
17
Q
Ear stones.
A
Otoliths
18
Q
Connects the middle ear with the nasopharynx.
A
Pharyngotympanic tube
19
Q
Separates external acoustic meatus from the middle ear.
A
Tympanic membrane
20
Q
Contains utricle and saccule.
A
Vestibule
21
Q
Detects linear acceleration.
A
Vestibule
22
Q
Houses the spiral organ (of Corti.)
A
Cochlear duct
23
Q
The receptor organ for hearing.
A
Spiral organ (of Corti)
24
Q
The central part of the bony labyrinth.
A
Vestibule
25
A membrane that transmits sound vibrations to the auditory ossicles.
Tympanic membrane
26
```
What is the main function of the rods in the eye?
A) depth perception
B) color vision
C) vision in dim light
D) accommodation for near vision
```
C) vision in dim light
27
```
What structure regulates the amount of light passing to the visual receptors of the eye?
A) aqueous humor
B) lens
C) cornea
D) iris
```
D) iris
28
```
Receptors for hearing are located in the ________.
A) cochlea
B) semicircular canals
C) tympanic membrane
D) vestibule
```
A) cochlea
29
```
The oil component found in tears is produced by the ________.
A) lacrimal glands
B) ciliary gland
C) conjunctiva
D) tarsal gland
```
D) tarsal gland
30
```
The receptor for static equilibrium is the ________.
A) semicircular canals
B) macula
C) utricle
D) cochlea
```
B) macula
31
```
Farsightedness is more properly called ________.
A) myopia
B) emetropia
C) hyperopia
D) presbyopia
```
C) hyperopia
32
```
Seventy percent of all sensory receptors are located in the ________.
A) eye
B) ears
C) skin
D) nose
```
A) eye
33
```
Which of the following structures is not part of the external ear?
A) pinna
B) external acoustic meatus
C) tympanic membrane
D) pharyngotympanic tube
```
D) pharyngotympanic tube
34
```
Ordinarily, it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. This is because the cornea ________.
A) is not a living tissue
B) has no nerve supply
C) has no blood supply
D) does not contain connective tissue
```
C) has no blood supply
35
```
The oval window is connected directly to which passageway?
A) scala vestibuli
B) external acoustic meatus
C) pharyngotympanic tube
D) scala tympani
```
A) scala vestibuli
36
The first "way station" in the visual pathway from the eye, after there has been partial crossover of the fibers in the optic chiasma, is the ________.
A) superior colliculi
B) lateral geniculate body of the thalamus
C) visual cortex
D) temporal lobe
B) lateral geniculate body of the thalamus
37
Which of the following taste sensations is incorrectly matched to the chemicals that produce it?
A) sweet & organic substances such as sugar and some lead salts
B) sour & acids
C) salty & metal ions
D) bitter & alkaloids
E) umami & amino acids glutamate and lysine
E) umami & amino acids glutamate and lysine
38
```
U.S. employees must wear hearing protection at ________ dB or above.
A) 100
B) 90
C) 80
D) 70
```
B) 90
39
```
Information from balance receptors goes directly to the ________.
A) motor cortex
B) visual cortex
C) brain stem reflex centers
D) back muscles
```
C) brain stem reflex centers
40
```
Most newborns ________.
A) are myopic
B) often use only one eye at a time
C) see in tones of red and green only
D) cry with copious tears
```
B) often use only one eye at a time
41
```
The blind spot of the eye is where ________.
A) more rods than cones are found
B) the macula lutea is located
C) only cones occur
D) the optic nerve leaves the eye
```
D) the optic nerve leaves the eye
42
```
Olfactory cells and taste buds are normally stimulated by ________.
A) substances in solution
B) stretching of the receptor cells
C) the movement of otoliths
D) movement of a cupula
```
A) substances in solution
43
Light passes through the following structures in which order?
A) vitreous humor, lens, aqueous humor, cornea
B) cornea, aqueous humor, lens, vitreous humor
C) cornea, vitreous humor, lens, aqueous humor
D) aqueous humor, cornea, lens, vitreous humor
B) cornea, aqueous humor, lens, vitreous humor
44
Ceruminous glands are ________.
A) saliva glands found at the base of the tongue
B) modified apocrine sweat glands
C) glands found in the lateral corners of your eye
D) modified taste buds
B) modified apocrine sweat glands
45
The rocks found in one's head (calcium carbonate crystals) are called ________.
Otoliths
46
The middle ear ossicle is the ________.
Incus
47
The oval window touches the stapes and the ________.
Vestibule
