Ear and Eye mastering A&P
presbyopia
After the age of 40 the elasticity of the lens decreases, making it difficult to clearly see close objects. What is this condition called?
true
An astigmatism results from unequal curvatures of the cornea or lens.
middle ear
An ear infection following an illness such as a cold can pass from the throat through the auditory (pharyngotympanic) tube to the ________.
malleus
In severe cases of otitis media, a tube is implanted into the eardrum that allows for drainage. What bone of the ear is closest to the tube that is implanted?
sclera; cornea
The fibrous covering of the eye consists of the white outer layer, known as the ________, and a transparent portion known as the ________.
myopia
The inability to see distant objects is termed "nearsighted" or ________.
conjunctiva
The membrane that covers the outer surface of the eye and lines the eyelids is the ________.
vision
The only special sense that is NOT fully functional at birth is ________.
iris
The pigmented portion of the eye that has a rounded opening through which light passes is the ________.
iris
The pupil is an opening within the ________.
optic disc (blindspot)
The region of the optic nerve lacking photoreceptor cells is known as the ________.
choroid
What layer of the eyeball contains both pigment to absorb stray light rays and muscle to control the lens?
semicircular canals
What part of the inner ear is contains receptors for dynamic equilibrium?
vestibulocochlear nerve
Which cranial nerve transmits hearing and equilibrium information to the brain?
damage to the cochlear nerve
Which of the following causes of deafness would be helped least by a hearing aid?
color blindness
Which of the following is a sex-linked condition that more often affects males?
cornea, aqueous humor, lens, vitreous humor
Which one of the following correctly lists the order of the parts through which light passes as it enters the eye?
degeneration of the hair cells in the organ of corti
what can cause sensorinerual deafness
glaucoma
what condition results from an abnormally high pressure inside the eye
inability of auditory ossicles to vibrate
what is a possible cause of conduction deafness
retina
what is part of the sensory layer of the eye
the lens
what part of the eye is affected by cataracts
accommodation
The ability of the eye to focus on close objects is known as ________.
lens
The biconvex structure that focuses light on the retina is the ________.
true
The ciliary body is a smooth muscle structure to which the lens is attached.