Senses Test Flashcards
the “white” of the eye is called the
sclera
the area of the retina that contains only cones is the
fovea centralis
this structure drains the aqueous humor
scleral venous sinus
myopia
- “nearsighted”
- Light from distant objects is focused in front of retina
- Cause: eyeball too long, lens too strong, or cornea too curved
- Correction: need concave corrective lenses
emmetropia
“normal vision”
Lens focusing light on retina
hyperopia
“farsighted”
Light from distant object focused behind retina
Cause: eyeball too short, or “lazy lens”
Correction: need convex corrective lenses
what is the area of the visual pathway where optic fibers from the medial side of each eye cross over
optic chasim
the clear central anterior portion of the sclera is called the
Cornea
tears are produced by the lacrimal glands located where
lacrimal fossa
what are the three types of cones that are sensitive to specific wavelengths of light
Blue light (blue cones) Green light (green cones) Green/red light (red cones)
know the order of the parts through which light passes as it enters the eye
cornea, aqueous humor, iris, lens, nitrous humor, optic disk, optic nerve
another name for the eardrum
tympanic membrane
the deposits of calcium salts that help in static equilibrium are called
otoliths
the structure that contains the receptors for hearing is
organ of court (receptors=hair cells
Skin receptors
Naked nerve endings
Pressure, heat
Photoreceptors
Eye
Light
Chemoreceptors
Nose, tongue
Chemicals
Mechanoreceptors
Touch hearing
primary taste sensations
sweet, sour, bitter, salty, umami,
what are gustatory cells stimulated by
- respond to dissolved chemicals
- Have gustatory hairs that get stimulated, depolarize and send impulse via three cranial nerves
the reflex that allows you to bring your eyes “crossed” to see things up close is called the
Convergence
which sense is the last sense to “leave” when you go to sleep and the first to become active when you wake up
hearing
conduction deafness
loss of hearing due to something interfering with conduction of sound vibrations to fluid of inner ear
sensorial deafness
deafness due to degeneration or damage to receptor cells in Organ of Corti, cochlear nerve or neurons to auditory cortex
static equilibrium
Has receptors in vestibule-macule
Macule=when head moves otoliths orient in response to gravity, pulls hairs, sends impulse to vestibular nerve
Tells position of head, in relation of gravity, when not moving
Receptor hairs are in otolithic membrane
Gel material with otoliths (stone of calcium salts)
dynamic equilibrium
Receptors in the semicircular canals Canals have three orientations Respond to rotation of head EX: boat rocking Twirling around
how do colds effect all of the senses
when we have a cold all of the mucous that is present keeps us from being able to smell. This causes our taste to be off because the olfactory system is part of tasting food. The congestion may also lead to an ear infection, which impairs hearing. The receptors are affected so; therefore, touch is affected. Eyes can become infected or inflamed, which affects sight.
