Chapter 15 Flashcards
Protects and shapes the eyeball; provides a sturdy anchoring site for extrinsic eye muscles.
A
Blood vessels supply nutrition to all eye layers.
B
Contains only cones; provides detailed color vision.
D
Lacks photoreceptors; where optic nerve exits the eye.
E
Consists of a pigmented layer and a neural layer.
C
Pinna.
A
Tympanic membrane.
E
Stapes.
C
Semicircular canals
B
Cochlea.
D
Balance organ.
B
Houses organ of Corti.
D
The sensory layer of the eye.
Retina
The structure most responsible for focusing light rays that enter the eye.
Lens
Helps maintain the intraocular pressure; located in the anterior part of the eye.
Aqueous humor
Area of greatest visual acuity.
Fovea centralis
Ear stones.
Otoliths
Connects the middle ear with the nasopharynx.
Pharyngotympanic tube
Separates external acoustic meatus from the middle ear.
Tympanic membrane
Contains utricle and saccule.
Vestibule
Detects linear acceleration.
Vestibule
Houses the spiral organ (of Corti.)
Cochlear duct
The receptor organ for hearing.
Spiral organ (of Corti)
The central part of the bony labyrinth.
Vestibule
A membrane that transmits sound vibrations to the auditory ossicles.
Tympanic membrane
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
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
Receptors for hearing are located in the \_\_\_\_\_\_\_\_. A) cochlea B) semicircular canals C) tympanic membrane D) vestibule
A) cochlea
The oil component found in tears is produced by the \_\_\_\_\_\_\_\_. A) lacrimal glands B) ciliary gland C) conjunctiva D) tarsal gland
D) tarsal gland
The receptor for static equilibrium is the \_\_\_\_\_\_\_\_. A) semicircular canals B) macula C) utricle D) cochlea
B) macula
Farsightedness is more properly called \_\_\_\_\_\_\_\_. A) myopia B) emetropia C) hyperopia D) presbyopia
C) hyperopia
Seventy percent of all sensory receptors are located in the \_\_\_\_\_\_\_\_. A) eye B) ears C) skin D) nose
A) eye
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
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
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
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
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
U.S. employees must wear hearing protection at \_\_\_\_\_\_\_\_ dB or above. A) 100 B) 90 C) 80 D) 70
B) 90
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
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
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
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
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
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
The rocks found in one’s head (calcium carbonate crystals) are called ________.
Otoliths
The middle ear ossicle is the ________.
Incus
The oval window touches the stapes and the ________.
Vestibule
