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प्रश्न
The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the
(a) fovea
(b) iris
(c) blind spot
(d) optic chaisma
उत्तर
Blind spot
Blind spot is the part where the optic nerve passes out of the retina. Photoreceptors are absent from this region
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संबंधित प्रश्न
Define the term "power of accommodation" of human eye.
Give the scientific names of the following parts of the eye:
muscles which change the shape of the eye-lens.
Give the scientific names of the following parts of the eye:
changes shape to focus a picture on the retina.
There are two types of light-sensitive cells in the human eye:
To what is each type of cell sensitive?
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?
Which of the following changes occur when you walk out of bright sunshine into a poorly lit room?
(a) the pupil becomes larger
(b) the lens becomes thicker
(c) the ciliary muscle relaxes
(d) the pupil becomes smaller
Out of animals of prey and predators, which have their eyes:
at the front of their head?
Fill in the following blank with suitable word:
Having two eyes gives a ................field of view.
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during distant vision?
With reference to the functioning of the eye, answer the question that follow:
Name the two structure in the eye responsible for bringing about the change in the shape of the lens.
Give the main function of the following:
Three semicircular canals
Name the following:
The opening through which light enters the eyes.
Choose the correct answer.
Rods are receptor of ______________
For the normal human eye, the near point is at ___________ cm.
For a healthy human eye, the distant point is infinite distance.
______ is tough and thick white sheath that protects the inner parts of the eye.
Which of the following statements is correct regarding rods and cones in the human 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 accommodation |
Name the following:
Place of no vision in the retina of the eye.
The figure given below refers to the vertical section of the eye of a mammal. Study the figure carefully and answer the following questions.
 |
- Label the guidelines shown as 1 to 10.
- Write one important role of parts shown as 3 and 7.
- Write one structural difference between the parts shown as 9 and 10.
- Mention one functional difference between the parts shown as 6 and 8.
