Advertisements
Advertisements
प्रश्न
Write the name.
The part of human eye that transmits electrical signals to the brain.
उत्तर
The part of human eye that transmits electrical signals to the brain- Optic nerve
संबंधित प्रश्न
List the parts of the human eye that control the amount of light entering into it. Explain how they perform this function.
Write the function of the following part of the human eye: Cornea
Draw labelled diagrams of the following: Eye
How does the eye regulate the amount of light that falls on the retina?
Myopia is an example of ______.
With the help of ciliary muscles the human eye can change its curvature and thus alter the focal length of its lens. State the changes that occur in the curvature and focal length of the eye lens while viewing (a) a distance object, (b) nearby objects.
What kind of lens is present in the human eye?
Name two types of cells in the retina of an eye which respond to light.
Fill in the following blank with suitable word:
The iris controls the amount of................entering the eye.
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?
What shape are your eye-lenses:
when you look at your hand?
Suggest how your irises help to protect the retinas of your eyes from damage by bright light.
Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.
Which of these persons cannot donate eyes?
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
The region in the eyes where the rods and cones are located is the
Differentiate between members of the following pair with reference to what is asked in bracket.
Rod and cone cells (pigment contained)
Mention if the following statement is true (T) or false (F) Give reason.
Short-sightedness and hyperopia are one and the same thing
Name the muscles of the eye responsible for the power of accommodation.
Give scientific reason:
One can sense colours only in bright light.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The part of the eye which can be donated from a clinically dead person is the Retina.
State the main functions of the following:
Seminal Vesicles
Name the following:
Short sightedness.
Define the following:
Blind spot
Name the respective organs in which the following are located and mention the main function of each:
(i) Iris
(ii) Semicircular canals
Give the main function of the following:
Three semicircular canals
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.
Choose the Odd One Out:
Complete the following sentence with appropriate Word
The part of the human eye where rod cells and cone cells are located is the:
Complete the following sentence with appropriate Word
The aperture in the eye through which light enters is the:
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.
Draw the struture of human eye and label its parts.
Given below is a diagram depicting a defect of the human eye. Answer the questions that follow:
- Give the scientific term for the defect.
- Mention one possible reason for the defect.
- What type of lens can be used to correct the defect?
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 |
| 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 |
Arrange and rewrite the term in group in correct order to be in a logical sequence, beginning with the term that is underlined:
Pupil, Aqueous humour, Retina, Vitreous humour.
Name the following:
Place of no vision in the retina of the eye.
Give reason:
Blind spot is considered as 'area of no vision'.
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.
