Head and Neck
Terms in this set (66)
3 functions of the nasal cavity?
Wrt respiration what does the nasal cavity do (3)?
1.) Rigid airway
2.) Warms air
3.) Filters and provides MUCOCILLIARY TRANSPORT
Wrt olfaction what does the nasal cavity do (2)?
1.) Stimulate free nerve endings in NASAL MUCOSA
2.) Olfactory signal via CN I
Wrt phonation what does the nasal cavity do?
Adds RESONANCE TO VOICE
What are the paranasal sinuses lined with?
4 Paranasal sinuses.
Which of the paranasal sinuses is the largest?
After what age is the frontal sinus present?
The sphenoid sinus is located on the posterior superior wall of the _____________.
Gustation or taste is medicated by _________.
5 basic tastes.
5.) Umami (MSG)
Anterior 2/3 of the tongue is innervated by the which nerve?
Facial Nerve (CN VII)
Posterior 1/3 of the tongue is innervated by the which nerve?
Glossopharyngeal Nerve (CN IX)
Children have ____ teeth while adults have ___ permanent teeth.
Superficial, thin, muscle of the neck that you must call vascular surgeon if you see a lesion.
Portion of the eye that reflects light?
Portion of the eye that is made up of mucous membrane?
Outer protective layer of the eye?
Supports cilliary body and controls light refraction from the lens.
Also helps control light refraction by forming image on retina.
Refractive error when light focuses behind the retina? What lens would you use to fix it?
- Hyperopia ("far-sighted")
- Convex lens
Refractive error when light focuses in front of the retina? What lens would you use to fix it?
- Myopia ("near-sighted")
- Biconcave lens
Refractive error d/t abnormal lens curvature? What lens would you use to fix it?
- Cylindric lens
Refractive error d/t loss of accommodation w/ age? What lens would you use to fix it?
- Convex lens
Pigmented circular and radial muscle of the eye that controls pupil size.
Where does the Iris lie? What chambers does it define?
- In front of the lens
- Anterior and Posterior portion
Portion of the eye that controls the amt of light passing into the eye, plays a role in accommodation, and is a pathway circulation btwn anterior and posterior eye.
Pupillary constriction is controlled by which pathway?
Pupillary dilation is controlled by which pathway?
Wrt light reflex (constriction) 2nd order neurons go ipsilateral and contralateral via _____________.
Clear liquid that fills the anterior and posterior chambers of the eye
Aqueous humor is produced by the __________ and reabsorbed into the ________________.
- CILLIARY BODY
- CANAL OF SCHLEMM
If there are obstructions in the eye, there is an increase in intraocular pressure aka _________.
Normal intraocular pressure?
Gel-like substance that fills the space between the lens and retina
Pigmented structure that contains the blood vessels that supply the eye?
What structures are included in the ureal tract?
Iris, cilliary body, choroid
Neural lining of the posterior 2/3 of the eye?
Photoreceptors with visual pigment
Photoreceptor that relays black and white (night vision).
Photoreceptor that relays color sensation (day vision)
3 photo pigments of cones?
Red, green, blue
Which photoreceptor are more numerous and have higher sensitivity?
Central located, pigmented yellow area of the retina
Middle of the Macula Lutea, the central axis of vision
If you had an increase [cones] at a certain point, you would have an increase in what?
"Blind spot" or area with NO PHOTORECEPTORS.
Where do retinal blood vessels enter and exit the eye?
On PE where is the optic disc located?
Medial to the Macula lutea
This carries visual impulses via CN II to brain nuclei of the OCCIPITAL LOBE.
The Auricle or pinna is made up of what?
Outer 1/3 of the auditory canal is made up of what?
What 3 things does the auditory canal contain?
1.) Sebaceous Glands -> Sebum
2.) Ceruminous Glands -> Cerumen
3.) Hair follices
What encompasses the outer ear?
Auricle, auditory canal, tympanic membrane
What encompasses the middle ear?
Ossicles and eustachian tube
What encompasses the inner ear?
Cochlea, & Vestibular portion
Which part of the ear is responsible for balance and hearing?
What separates the auditory canal from the middle ear?
What connects the middle ear with the Nasopharynx?
The eustachian tube allows equilibrium of the _________ & __________.
Middle ear & atmospheric pressure
Why is the eustachian tube a common site of ear dz in children at birth?
it is HORIZONTAL (in adults it's at a 45 degree angle)
What are the ear ossicles? Their function?
- MALLEUS, INCUS, STAPES
- the transmit vibrations of the TM to the inner ear
3 chambers of the cochlea?
1.) Scala Vestibuli
2.) Scala Media
3.) Scala Tympani
What does the Scala Media contain?
ORGAN OF CORTI
What is the human hearing frequency range?
Normal speech frequency?
300-3,500 Hz at 65 dB
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