Chapter 8 Special Sense Flashcards
Blind spot
The small, circular, optically insensitive region in the retina where fibers of the optic nerve emerge from the eyeball.
Accommodation
Adjustment of the eye for seeing objects at close range.
Chemoreceptors
Receptors sensitive to various chemicals in solution.
Choroid
The pigmented nutritive layer of the eye
Ciliary body
the ciliary body is a circular band of muscle that is connected and sits immediately behind the iris.
Cochlea
A cavity of the inner ear resembling a snail shell; house the hearing receptor.
Cornea
The transparent anterior portion of the eyeball
Crista ampullaris
the sensory organ of rotation located in the semicircular canal of the inner ear.
Dynamic equilibrium
Sense that reports on angular or rotatory movements of the head in space
Iris
The pigmented, involuntary muscle that acts as the diaphragm of the eye
Labyrinth
Bony cavities and membranes of the inner ear that house the hearing and equilibrium receptors.
Lens
The crystalline lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina.
Maculae
receptors for static equilibrium (up and down motion)
mechanoreceptors
receptors that respond the physical forces (movement of the head, fluid, balance)
olfactory receptors
Smell
ossicles
small bones- transmit vibration of the eardrum to the fluids in the inner ear : hammer/malleus, anvil/incus, stirrup/stapes
photoreceptors
rods (allows us to see in grey tones and peripheral/cones (respond to light)
Refraction
Bend of the rays
sclera
the outer fibrous layer of the eye. a tough, protective white covering and helps maintain shape
Taste buds
Taste
middle ear/ tympanic cavity
small, airfilled cavity within the temporal bone, a small, air-filled, mucosa-lined cavity in the petrous portion of the temporal bone; spanned by the auditory ossicles
vestibule/semicurcular canals
part of the bony labyrinth of the inner ear
