chap 1 Flashcards
Sclera
protects and maintains the shape of the eyeball
Choroid
supplies nutrients and oxygens to the eyeball
Retina
detects light
Conjunctiva
protects sclera
Cornea
Refracts light onto the retina
Aqueous humor
helps to focus image onto the retina
Pupil
Controls the amount of light entering the eye
Iris
Controls the size of pupil
Eye lens
Refracts and focuses light to create a better image for retina
Suspensory ligaments
Holds the eye lens in place
Ciilary muscle
controls and relaxes to change the thickness of the eye
Vitreous humor
(same as aqueous humor)
Yellow spot
detects light or image that falls on it
Blind spot
Least sensitive to light
Optic nerves
carries nerve impulses
Short sighted
correction :
kanta cekung
astigmatism
kanta silinder
Long sighted
kanta cembung
Sistem saraf pusat
Otak
Saraf tunjang
Sistem saraf periferi
Saraf spina
Saraf kranium
Two photoreceptors
- cone cell
- red cell
Gerak balas tumbuhan has 2 things
Tropisme and gerak balas nastik
Geotropisme
Gravity
Fototropisme
cahaya
Hydrotropisme
water
Thigmotropisme
touch
Tropisme postif
bergerak ke arah rangsangan
Tropisme negatif
bergerak menjauhi rangsangan
Gerak balas nastik
directionless touch
ex : venus fly trap, closing leaf
Stereoscopic vision
Eyes located in front of head.
Helps animals to hunt.
E.g. human and most predators
Monocular vision
Eyes located at sides of head.
Helps animals detect enemies.
E.g. most prey
Stereophonic Hearing
hearing using both ear
Importance of Stereophonic Hearing
to determine location of a source of sound
