Eye and ear and kidney Flashcards
Auricle
(outer ear)
collects and directs sound waves to auditory canal
Auditory canal
(outer ear)
Directs soundwaves to eardrum
tympanic membrane (eardrum)
(Middle ear)
Translates vibrations to ossicles
Ossicles
(middle ear)
amplify pressure of sound waves as they are transmitted to oval window
Oval window
(middle ear)
Transmits vibrations from stirrup to fluid filled cochlea
Round window
(inner ear)
Equalises pressure in the cochlea when oval window vibrates
Eustachian tube
(inner ear)
equalises pressure on both sides of eardrum
Cochlea
(inner ear)
Vibrations cause hair cells to bend producing a nerve impulse
Auditory nerve
(inner ear)
Transmits dound information to brain
Conjuctiva
Protects and lubricates eye with tears and mucous
Cornea
barrier protection for the eye and refracts light rays
Sclera
Provides structure and support and maintains shape of the eyeball
Choroid
Provides blood supply to the eye
Aqueous humour
Maintains pressure, provides eye nutrition and refracts light
Iris
controls amount of light that enters eye
Pupil
Allows entry of light into eye
Lens
main refractive structure in the eye that focuses light onto retina
Cilary body/muscles
Holds lens in position and changes its thickness
Vitreous humour
Maintains spherical shape of eye and has some refractive ability
Retina
Converts light to electrochemical signals
Macula
allows for sharp, clear, straight-ahead vision
Optic nerve
Transmits nerve impluses from retina to brain
eye muscles
rotates the eyeball within socket
Glomerus
FILTRATION
Blood cells and large proteins cannot pass through
water and solutes passively pass through
Proximal convoluted tubule
SECRETION - active transport of unwanted substances such as drugs from blood into tubule
REABSORPTION - primarily passive return of water, ions, and glucose from filtrate into blood
Loop of henle
REABSORPTION
main site of water reabsorption back into blood. it is impermeable to ions
Distal convoluted tubule
REABSORPTION
further reabsoption of ions is regulated by ADH
Nephron
FILTRATION
contains filtering structure called glomerulus and tubule