Nervous System Part. C (ears And Eyes)

Question 1

What lobe in the brain is related to the eyes?

Answer 1

Occipital

Question 2

Where are the eyes placed in the skull?

Answer 2

Orbital cavities

Question 3

What are the muscles in the oral cavity attached to the eyeball that help move the eye called

Answer 3

Extrinsic

Question 4

What are two examples of intrinsic muscles (muscles in eye)

Answer 4

Iris and ciliary muscles

Question 5

What are the three outer layers of the eyeball called?

Answer 5

Sclera, choroid, retina

Question 6

What is the most outer layer of the eye called that we can touch?

Answer 6

Cornea

Question 7

What is the Sclera

Answer 7

The visible white part of the eye,
forms the cornea, hard, rounds eye

Question 8

What is the corneas function?

Answer 8

Bending light towards the pupil and onto the retina

Question 9

What is the gland that produces tears?

Answer 9

Lacrimal

Question 10

What is the thin membrane protecting the cornea?

Answer 10

Conjunctiva

Question 11

What does the choroid layer do?

Answer 11

Absorbs stray light, helps nourish the cells of the retina, reflective part of the animal eyes

Question 12

What does the iris do?

Answer 12

Controls the amount of light entering the eye. Lowlight equals, dilation, bright light equals constriction.

Question 13

What is found behind the iris and pupil

Answer 13

Lens

Question 14

What does sclera contain

Answer 14

Cornea

Question 15

What does choroid layer contain

Answer 15

Retina, ciliary muscles, iris

Question 16

What does the lens do

Answer 16

It bends light in order to focus on the retina

Question 17

What are the two main Chambers and what are they filled by?

Answer 17

The anterior chamber is filled with aqueous humor, the posterior chamber is filled with vitreous humour

Question 18

What does the aqueous humour and vitreous humour do?

Answer 18

Maintains the pressure in the eye, and nourishes the cells of the retina, cornea and lens

Question 19

What does the retina contain?

Answer 19

Rods, cones, photo receptor cells

Question 20

What do photoreceptor cells do?

Answer 20

Measure light

Question 21

What do the rods do?

Answer 21

Respond to low intensity, light

Question 22

What is the light sensitive pigment in rods called

Answer 22

Rhodopsin

Question 23

What is the adjustment to light intensity called?

Answer 23

Adaptation reflex

Question 24

What do the cones do?

Answer 24

Function in bright light to produce a coloured image

Question 25

What is found at the back of the retina important for clear vision?

Answer 25

Fovea centralis

Question 26

What is the pigment present and cones called?

Answer 26

Iodopsin

Question 27

What is the region of the eye where the retina has no photo receptor cells

Answer 27

Optic disc

Question 28

What is the place where the optic nerves from both eyes crosses over called

Answer 28

Chiasma

Question 29

What is the ability to see near and far called and what does it use

Answer 29

Accommodation, ciliary and suspensory ligament

Question 30

What is myopia and how do you fix it?

Answer 30

Near sighted, need a concave lens

Question 31

What is hyperopia and how do you fix it?

Answer 31

Farsighted, convex lens

Question 32

What are the two main functions of the ear

Answer 32

Hearing and equilibrium

Question 33

What composes the outer ear?

Answer 33

Pinna an auditory canal

Question 34

What composes the middle ear?

Answer 34

Type panic membrane, ossicles

Question 35

What does the eardrum do or tympanic membrane?

Answer 35

Change your sound waves into vibrations that transmit to the ossicles

Question 36

What is the main function of the ossicles?

Answer 36

Amplify and carry sound to inner ear

Question 37

What are the three ossicles

Answer 37

1. Hammer (malleus) 2. Anvil (incus) 3. Stirup (stapes)

Question 38

How do we keep the pressure inside the middle ear constant with external pressure

Answer 38

Eustachian tube

Question 39

What is the stirrups job

Answer 39

Strikes a little membrane called oval window sound is then amplified

Question 40

What is the inner ear composed of?

Answer 40

1. vestibule (static equilibrium) 2. Semicircular canals (dynamic equilibrium) 3. Cochlea

Question 41

What does the organ of Corti do?

Answer 41

Sound energy gets converted into an electrical impulse at auditory nerve

Question 42

What are the two membranes involved in the organ of Corti?

Answer 42

Tectorial membrane and basilar membrane

Question 43

What is equilibrium, composed of

Answer 43

Semicircular canals and vestibules (saccule and utricle)

Question 44

What is the vestibule?

Answer 44

Vestibule contains little grains of calcium carbonate called otoliths,(relays head position to brain)

Question 45

What part of the brain is balance associated with?

Answer 45

Cerebellum

Question 46

What are the two main types of deafness?

Answer 46

Conduction deafness, a nerve deafness