Chapter 12 Special Senses Flashcards
Up to slide 14
What are the 3 compartments of the cochlea
Scala Vestibulli, Scala Tympani, Cochlear Duct
What is the function of senses ?
To maintain homeostasis by collecting information from outside and internally
Olfactory nerves–> olfactory bulbs—> olfactory tracts—> limbic system(emotions) & olfactory cortex
This is a _________
Olfactory Pathway
Taste ____ are modified epithelial cells that function as receptors
CELLS
Taste _____ are microvilli that protrude from taste cells through pores of taste buds.
HAIRS
+ are most sensitive parts of taste cells
Taste buds are what? And where are they found in
They are the ORGANS of taste and found in
-lining of cheeks
-roof of mouth
-walls of pharynx
What is the ears function?
Hearing & Equilibrium (balance)
What is an ossicle?
Bone
_____ is stimulated by carbohydrates
Sweet Receptors
_____ is stimulated by organic compounds, Mg and Ca salts
Bitter Receptors
_____ is stimulated by some amino acids. MSG
Umami taste receptors
What cranial nerves help taste receptor cells travel to the brain
Facial Nerve (VII)
-Glossopharyngeal Nerve(IX)
-Vagus Nerve (X)
What is the tympanic cavity?
Air-filled space in temporal bone
What is the Auditory (Eustachian) tube? And what is its function?
Connects the middle ear to throat
aka a gap from throat to ear
What fluid is Membranous labyrinth filled with?
ENDOlymph
What is the Membranous Labyrinth in between with?
Perilymph fluid and endolymph fluid
What fluid is Osseous(bony) labyrinth filled with?
PERilymph
Semicircular Canals function in _______ equilibrium
a. dynamic b. static
DYNAMIC
aka movement/moving
Vestibule functions in ______ equilibrium
a. dynamic b. static
static
Aka standing still
Intercommunicating chambers and tubes called ________
Labyrinth
Name the THREE cochlear MEMBRANES and their locations
> Vestibular membrane
-Separates scala vestibuli from cochlear duct
Basilar Membrane
- Separates Cochlear Duct from Scala Tympani
And forms floor of cochlear duct
Tectorial Membrane
-Extends partially into cochleae duct
And makes the roof of the spiral organ aka hearing receptor organ
The Vestibule consists of two expanded chambers what are they?
Utricle and Saccule
Define Uricle
Chamber in the Inner ear associated with static equilibrium
Define Saccule
Saclike cavity that makes up part of the membranous labyrinth of the inner ear
