Lab 11 - Special Senses Flashcards
Describe the cones of the eye
Color vision, work in bright light, give detail
Describe the rods of the eye
Night vision, work in dim light
The _____ of the eye is clear, whereas the ______ of the eye is white.
cornea; sclera
List the 3 tunics of the eye from superficial to deep
Fibrous, vascular, and neural tunics
What two things make up the fibrous tunic?
The sclera and cornea
What 4 things make up the vascular tunic?
The choroid, ciliary body, anterior segment with aqueous humor, and the iris
What 5 things make up the neural tunic?
Retina, ora serrata, macula lutea, fovea centralis, and optic disc
The dark part of the vascular tunic is called the _______.
choroid
What part of the eye contracts when you look at something close to your face?
The ciliary body
What does the ciliary body do?
Contracts when you look at something close to you
The _______ humor is in the front of the eye, and the _________ humor is in the back
aqueous; vitreous
What is the dark spot on the retina called?
The fovea
What is the dark ring around the fovea called?
Macula
What 3 cranial nerves control eye movement?
Oculomotor, trochlear, and abducens
What muscles do the oculomotor nerve control?
Superior rectus, medial rectus, inferior rectus, and inferior oblique
What muscle does the trochlear nerve control?
Superior oblique
What muscle does the abducens nerve (CN6) control?
Lateral rectus
What eye muscles extend laterally instead of inferiorly?
Superior and inferior oblique
The outer cartilaginous part of the ear is called the _______ or ________
auricle or pinna
What three things make up the outer ear?
Auricle/pinna, external acoustic meatus, and tympanic membrane
What does the external acoustic meatus (external auditory canal) do?
Has hairs and ceruminous glands that make ear wax
What does the tympanic membrane do?
Vibrates from sound waves
What is the tympanic membrane also called?
Ear drum
What are the 4 parts of the middle ear?
Malleus, incus, stapes, and eustachian tube
What makes up the auditory ossicles?
Malleus, incus, and stapes
Describe the eustachian (auditory) tubes
- Held closed by cartilage
- Goes to pharynx
What makes up the inner ear?
3 semicircular canals, vestibule, and cochlea
What do the 3 semicircular canals do?
Help with dynamic equilibrium
What produces the aqueous humor of the eye?
Ciliary body
What type of muscle makes up the iris?
Smooth
