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Biology > Sense Organs > Flashcards

Sense Organs Flashcards

(65 cards)

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1
Q

State the location of the eye

A

The two eyes are located in deep sockets of orbits of the front side of the head

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2
Q

Why is blinking necessary

A

The two movable upper and lower highlights protect the eye from any kind of injury and clean the surface of the iBall by regular blinking

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3
Q

State the location of the tear gland or the lacrimal gland

A

Located at the upper side word portion of the orbit are present that tear or lacrimal glands

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4
Q

What makes up the white portion of the eye

A

SClera makes the white portion of the front eye

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5
Q

State the coloured part of the eye and what covers it

A

The cornea and it is covered by the
Sclera

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6
Q

How and why could excessive use of contact lenses lead to drying of the cornea

A

Cornea drives oxygen by diffusion therefore excessive use of contact lenses is not recommended as it could lead to drying of the cornea

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7
Q

The pigmented circular area seen in the eye

A

Iris

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8
Q

The contraction of which muscles help in the alteration of focal length of the eye lens

A

Ciliary muscles

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9
Q

The most sensitive region of the retina

A

The yellow spot

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10
Q

The innermost layer of the eye

A

Retina

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11
Q

The area where the images formed but not seen by eye

A

The blind spot

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12
Q

region the eye where the rods and the cones

A

Retina

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13
Q

The part of the eye that is responsible for the change in the size of the pupil

A

Iris

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14
Q

Fluid present in the posterior Chamber of the eye

A

Vitreous humour

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15
Q

The defect of the human eye caused due to the uneven surface of the cornea

A

Astigmatism

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16
Q

The type of lens used for correcting myopia

A

Biconcave

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17
Q

A condition during which a person feels difficulty while seeing in dim light

A

Night blindness

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18
Q

Name the photo receptors found in the retina of the eye

A

Rods and cons

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19
Q

The layer of the iBall that forms the transparent cornea

A

Sclera

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20
Q

The ear ossicle is in contact with the oval window of the inner ear

A

Stapes

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21
Q

Name the three ear ossicles of the ear

A

Malleus , incus, stapes

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22
Q

The biological term used collectively for the three small bones present in the middle ear

A

Ear ossicle

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23
Q

Name the part of the ear associated with static balance

A

Utriculus and sacculus

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24
Q

Name the part of the ear associated with hearing

A

Cochlea

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25
Name the part of the ear associated with dynamic balance
Semi circular canals
26
The part of the eye which is responsible for its shape
Sclera
27
The part of the eye that prevent the eyeBall from collapseing
Vitreous humour
28
The part of the retina on which the images focus for the clearest vision
Yellow spot
29
The ability of e y e adjust its focal length in order to obtain a clear vision of objects are different distance
Accommodation of the e y e
30
A defect in the E Y E due to which some part of the object is seen clearly while other same blurred
Astigmatism
31
e y e defect due to which two eyes some what converge leading to what is called cross eye
Squint
32
The nutritive layer of e y e also prevents the reflection of light
Choroid
33
The fluid which conveys the vibration of sound in the cochlea and the semi circular canal
Endolymph
34
A technical term for the structure found in the inner e a r
Membraneous labyrinth
35
The receptors which help in the sensation of taste
Sensory papillae
36
Enability of eye to focus on nearby objects due to the loss of elasticity of lens with age
Presbyopia
37
Hypermetropia can be corrected using a
Biconvex lens
38
Tympanic chamber is filled with what fluid
Perilymph fluid
39
Location of the Iris
In the eye behind the cornea
40
Location of the Yellow spot
Near the centre of the retina
41
Location of the organ of corti
In the cochlea of the ear
42
Location of the pinnae
Side of the head
43
Location of the eustachian tube
Between the middle ear and the pharynx
44
Location of the semi circular canals
In the internal ear
45
State the function of cornea
It covers and protects the Iris and allows the entry of light rays into the eye
46
State the function of iris
It controls the size and the diameter of the pupil according to the intensity of the illumination
47
State the function of aqueous humour
It allows light rays to pass into the eye and prevents the refraction and dispersion and keeps the lens moist
48
State the function of choroid
It has many capillaries forms the nutritive layer of the retina and absorbs light rays to avoid reflection
49
State the function of cochlea
It is the organ of hearing
50
State the function of visual purple
It has a vitamin A derivative that helps the eyes to see in the dim light
51
State the function of conjunctiva
It supplies nourishment to the eye and prevents infection it covers the cornea and lines inside of the eyelid
52
State the function of vitreous humour
It maintains the shape of the eyeball
53
State the function of suspensary ligaments
There fibres that hold the lens in position
54
State the function of ear drum
It vibrates according to the sound waves and transmits Dem across the middle ear
55
State the function of ear ossicles
Amplifier the vibrations of the ear drum and transmit them to the delicate membrane stretched along the oval window
56
State the function of semi circular canals
They are concerned with maintaining the equilibrium and the posture of the
57
State the function of endolymph
It transmits vibration to the hair cells of the inner ear to produce acoustic perception
58
State the function of eustachian tube
It equalises air pressure on the ear drum from the inside
59
State the function of tears
Tears clean the front surface of the eye by removing dust particles and enzyme lysosome present in tears kill the germs
60
Describe cataract
It is a condition in which the lens turns Opaque and the vision is cut down even total blindness it can be corrected by surgically removing the lens and replacing with artificial one and also using spectacles with high convex lens
61
Differentiate between vitreous humor and aqueous humour
Vitreous humor has high specific gravity aqueous humor has low specific gravity a human is found between the retina and the lens of the posterior eye Aquasure is found between the cornea and the length of the anterior in the eye
62
Difference between short citedness and long sightedness
The images fall in front of retina the images fall beyond the retina short sightedness is corrected by using glasses of concave lens long sightedness is corrected by using glasses of convex lens
63
Differentiate between rods and cons
Rods contain Rodopsin and cones contain idopsin
64
Differentiate between retina and choroid
It is the innermost layer of the iBall is the middle layer of the iBall tunics retina contains neurons, choroid contains blood capillaries
65
Differentiate between cochlear and concha
Cochlea is the part of inner ear and conceal is that ear pinna of cartilage Cochlea is associated with hearing and concha collects the wound waves

Biology (7 decks)

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