the senses

Question 1

name the two types of light receptor cells in the retina and give on function of each type

Answer 1

rods- detect black and white
cones- detect colour

Question 2

explain why damage to optic nerve could result in blindness

Answer 2

wouldn’t carry impulses from the rods and cones to the brain

Question 3

describe one corrective measure for a named hearing defect

Answer 3

glue ear - grommets

Question 4

name one of the other sense and name an organ associated with this sense

Answer 4

taste and tongue

Question 5

give one function go the optic nerve

Answer 5

carry impulses from the rods and cones to the brain

Question 6

give one function of the Irish in the eye

Answer 6

controls the amount of light entering the eye

Question 7

give one function of the Eustachian tube in the ear

Answer 7

equalises pressure on either side of the eardrum

Question 8

give one function of the semi circular canals in the ear

Answer 8

balance

Question 9

name and explain the role of each of the following - the fluid that fills the rear chamber

Answer 9

vitreous humour - supports the eye by exerting on outward pressure on the eyeball

Question 10

name and explain the role of each of the following - the transparent covering in front of the cornea

Answer 10

thin transport lining protecting the cornea

Question 11

digest an advantage of human having two eye

Answer 11

3d vision

Question 12

state two features of the lens of the eye for focusing light

Answer 12

transparent, curved

Question 13

briefly outline the function fo the pinna

Answer 13

collects vibrations in the air and channels them into the ear

Question 14

to which part of the body does the Eustachian tube link the ear

Answer 14

throat

Question 15

what is the role of the eusatchain tube

Answer 15

equalise pressure on either side of the eardrum

Question 16

name another part of the ear that has a function similar to that of the stirrup

Answer 16

hammer

Question 17

suggest why there are threes semi circular canals in each ear

Answer 17

to control in three dimensions

Question 18

name the part of the eye that has a corresponding function to the cochlea of the ear, explain your answer

Answer 18

retina, both contain recpetors

Question 19

name the structure that determines the diameter of the pupil

Answer 19

iris

Question 20

why is there a mechanism for changing the diameter of the pupil

Answer 20

to control the amount of light entering the eye

Question 21

certain parts of the gate are transparent and curved, name two such parts

Answer 21

cornea, lens

Question 22

how does the curvature contribute to the functioning of the eye

Answer 22

focuses the light

Question 23

eyelids

Answer 23

cover and protect the eyes

Question 24

sclera

Answer 24

tough fibrous outer layer, it maintains the shape of the eyeball

Question 25

choroid

Answer 25

contains blood vessels supplying food an oxygen to the cells of the eye

Question 26

retina

Answer 26

innermost cell that contains rods and cones

Question 27

auditory canal

Answer 27

carries vibrations to the eardrum

Question 28

eardrum

Answer 28

carries vibrations to the middle ear

Question 29

ossicles

Answer 29

hammer, anvil, stirrup

Question 30

what fluid is the inner ear filled with

Answer 30

lymph

Question 31

cause of glue ear

Answer 31

too much fluid collecting in the middle ear

Question 32

optic nerve

Answer 32

carry impulses from the rods and cones to the brain

Question 33

blind spot

Answer 33

no rods or cones in this area

Question 34

aqueous humour

Answer 34

holds the front of the eye in shape

Question 35

vitreous humour

Answer 35

supports the eye by exerting an outward pressure on the eyeball