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प्रश्न
Name the following:
Two pigments of the sensory cells.
उत्तर
Rod cells (rhodopsin) and cone cells (iodopsin).
संबंधित प्रश्न
Define the term.
Power of accommodation of the eye.
How does the eye regulate the amount of light that falls on the retina?
Explain the following:
Mechanism of generation of light-induced impulse in the retina.
Night birds have ______ cones than rods in their eyes.
What is the principal function of the eye-lens?
Where does the greatest degree of refraction of light occur in the eye?
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.
Refraction of light in the eye occurs at:
(a) the lens only
(b) the cornea only
(c) both the cornea and the lens
(d) the pupil
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
How much is our field of view:
with both eyes open?
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
Given below is certain structure. Write against them its functional acivity.
retina and ……………………….
We see advertisements for eye donation on television or in newspapers. Write the importance of such advertisements.
Choose the correct answer.
Rods are receptor of ______________
Complete the following sentence with appropriate Word
The aperture in the eye through which light enters is the:
The muscular diaphragm that controls the size of the pupil is ____________.
| 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 accomodation |
