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senses

A&P Corbit

QuestionAnswer
Projection= sensation seems to come from the area where receptors were stimulated, but actually 'sensed' in the brain
Intensity= some sensations are felt to a greater degree than others
Contrast= effect of a previous sensation on a current sensation
Adaptation= becoming unaware of a stimulus
Referred pain = originates in an internal organ and is felt in a cutaneous area (such as a patient having a heartattack and pain is felt in the arm)
What is the purpose of eyelashes help prevent dust and particles out of the eyes
Lacrimal = tears
Tears contain lysozyme which help prevent infections
Tears are made up mainly of water and salt
How many extrinsic muscles are attached to the outer surface of each eye 6
Sclera= white of the eye
Cornea = 1st part of the eye that refracts light. Anterior portion of the sclera
Conjunctiva = membrane that lines the eyelids & covers part of the outer surface of the eyeball
The lens changes shape to allow for accommodation
The shape of the lens is changed by the ciliary muscle
The "colored part" of the eye is the iris
The rounded opening in the iris is the pupil
PERRLA pupils equal regular react to light and accommodation
The inner layer of the eye is the retina
Rods respond to light
cones respond to color
Optic disk is known as your blind spot
Define night blindness and one of the major causes inability to see in dim light; lack of vitamin A
Define fovea a point of greatest visual acuity
Where is the fovea located macula
In macular degeneration, the patient loses what part of the eyesight central vision
Opacity of the lens is a cataract
Is there a medical treatment for a cataract? no
Removal of the cataract may restore useful vision. This involves removal of the lens
IOL= Intraocular lens
IOP= Intraocular pressure
Glaucoma is due to increased ... intraocular pressure
myopia= near sightedness
hyperopia= far sightedness
astigmatism= irregular curvature of the lens or cornea
presbyopia= old sightedness after 40
Strabismus= crossed eyes
Amblyopia= lazy eye
Emmetropia= normal vision
hemianopia= half vision; may been seen in patients who have had a CVA
contains receptors for hearing and equilibrium ear
Outer (external) ear consists of the pinna and the external auditory canal (or auricle---the part we usually call our ear)
What is at the end of the external auditory canal tympanic membrane, which vibrates when sound strikes it
Ceruminous glands secrete cerumen (medical term for ear wax)
A middle ear infections is known as otitis media
What connects the middle ear cavity with the throat (pharynx) Eustachian tube
What is the purpose of the Eustachian tube to equalize the pressure within the ear (on both sides of the tympanic membrane)
What is within the cochlea Organ of Corti
The Organ of Corti is known as organ of hearing
The inner ear contains the equilibrium apparatus and the cochlea
Utricle and saccule - contains hair cells; gravity pulls and bends as the position of the head changes; so, the help with equilibrium
How many semicircular canals 3
semicircular canels detect motion and also maintain equilibrium
The utricle and saccule provide information about.... the position of the body rest
Semicircular canals provide information about... the body in motion
Sound waves are blocked. May be temporary or permanent. What type of deafness is this Conductive
Which type of deafness is often due to listening to excessively loud music Sensory neural
presbycusis=
tinnitus = ringing of the ears
vertigo= dizziness
syncope= fainting
olfaction= sense of smell
gustation= sense of taste
Where are the sweet taste buds found tip of the tongue
Where are the sour tastebuds found side of the tongue
Where are the bitter taste buds found back of the tongue
Where are the salty taste buds found just back from the tip of the tongue
Hunger and thirst are visceral (internal) sensations meaning triggered by internal changes
The eyes do not work together because muscles do not coordinate in strabismus
The process of bending, which makes it possiable for light from a large area to be focused on a small surface is known as refraction
Injury or infection of the cornea may cause scar formation. Light rays cannot pass through the scar because there is now an area of opacity
The secreation of tears is called lacrimation
Created by: jhowe2323