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प्रश्न
Give the main function of the following:
Three semicircular canals
उत्तर
Three semicircular canals - It maintains the dynamic equilibrium.
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संबंधित प्रश्न
Which. of the following has normal vision?
(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc
What is the:
far point of a normal human eye?
What is the range of vision of a normal human eye?
Give the scientific names of the following parts of the eye:
changes shape to focus a picture on the retina.
What are rods and cones in the retina of an eye? Why is our night vision relatively poor compared to the night vision of an owl?
Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
If you walk from a dark room into sunlight and back again into dark room, how would your pupils alter in size? What makes this happen?
Why does the eye-lens not have to do all the work of converging incoming light rays?
A person got his eyes tested. The optician's prescription for the spectacles reads:
Left eye: − 3.00 D
Right eye: − 3.50 D
The person is having a defect of vision called:
(a) presbyopia
(b) myopia
(c) astigmatism
(d) hypermetropia
A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following statement is correct about this man?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Which of the following have a wider field of view?
(a) Animals having two eyes on the opposite sides of their head.
(b) Animals having two eyes at the front of their head.
Out of animals of prey and predators, which have their eyes:
on the opposite sides of their head?
Give the main function of the following:
Lachrymal glands
Name the following:
The part of the eye responsible for change in the size of the pupil.
Mention, if the following statement is True or False
The least distance of distinct vision for the human eye is 25 cm
The following figure show the change in the shape of the lens while seeing distant and nearby objects. Complete the figures by correctly labelling the diagram.
Assertion: Blind spot is a small area of the retina which is insensitive to light where the optic nerve leaves the eye.
Reason: There are no rods or cones present at the junction of the optic nerve and retina in the eye.
Match the following.
| Column - I | Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
| 3 | Ciliary muscles | c | near point moves away |
| 4 | Myopia | d | screen of the eye |
| 5 | Hypermetropia | e | Power of accomadation |
Write in proper sequence the names of all the parts of the human eye through which the light rays coming from an object pass before they form an image on the retina.
Write the main functional activity of the following structure.
Choroid
