Write Whether the Following is True Or False: Rods Are the Receptor Cells in the Retina of the Eye Sensitive to Dimlight. - Biology

Advertisements
Advertisements
MCQ
True or False

Write whether the following is true or false:
Rods are the receptor cells in the retina of the eye sensitive to dimlight.

Options

  • True

  • False

Advertisements

Solution

True

  Is there an error in this question or solution?
Chapter 9: Nervous System - Exercise 5 [Page 119]

APPEARS IN

Frank ICSE Class 10 Biology
Chapter 9 Nervous System
Exercise 5 | Q 8.06 | Page 119

RELATED QUESTIONS

Compare the following: Choroid and retina


Draw labelled diagrams of the following: Eye


Answer briefly:

How do you perceive the colour of an object?


How does the eye regulate the amount of light that falls on the retina?


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.


Differentiate between: Rods and cones


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


Distinguish between: aqueous humor and vitreous humor


Distinguish between: blind spot and yellow spot


Which. of the following has normal vision?

(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc


Myopia is an example of ______.


Fill in the blanks in the following.

The size of the pupil becomes ________ when you see in dim light.


Fill in the blanks in the following.

Night birds have _________ cones than rods in their eyes.

 


Draw a labelled sketch of the human eye.


Describe the anatomy of the human eye.


Explain the mechanism of vision.


Draw a neat and labelled diagram of the structure of the human eye


Match the following:

Column I Column II
(i) Myopia (a) Converging power of eye lens becomes low
(ii) Hypermetropia (b) Converging power of eye lens remains the same
  (c) Converging power of eye lens becomes high

Name two types of cells in the retina of an eye which respond to light.


What is the:  

near point of a normal human eye?


There are two types of light-sensitive cells in the human eye: 

Where are they found? 


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?


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


The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish


Mention if the following statement is true (T) or false (F) Give reason.

yellow spot of the retina is the region of colour vision


Mention if the following statement is true (T) or false (F) Give reason.

Blind spot is called so because no image is formed on it.


Sometimes you remember a vivid picture of a dream you saw. What is the role of your eyes in this experience?


Give scientific reason:
One can sense colours only in bright light.


Give scientific reason:

We cannot clearly see an object kept at a distance less than 25 cm from the eye.


What is the function of iris and the muscles connected to the lens in human eye?


State the main functions of the following:
Seminal Vesicles  


Define the following:
Blind spot


The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?


Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________


Choose the correct answer.
Colour is detected by ____________


Sketch and label V.S. of a human eye.


Differentiate between:

Vitreous humour and Aqueous humour.


Differentiate between:

Retina and Choroid.


Name the following:
Yellow spot and ciliary muscles are found in.


Give Technical Term:
The cells of the retina that are sensitive to colour.


Mention, if the following statement is True or False
Rods are responsible for vision in the dark


State the Location:
Iris


State the Function:
Cornea


State the Function:
Conjunctiva


Complete the following sentence with appropriate Word
The part of the human eye where rod cells and cone cells are located is the:


Long answer question

Draw the neat labelled diagram of the Sectional view of the human eye.


For the normal human eye, the near point is at ___________ cm.


Draw a scientifically correct labelled diagram of a human eye and answer the questions based on it:

  1. Name the type of lens in the human eye.
  2. Name the screen at which the maximum amount of incident light is refracted?
  3. State the nature of the image formed of the object on the screen inside the eye.

A small hole of changing diameter at the centre of Iris is called _______.


For a normal human eye the near point is at _______.


In a relaxed state, the focal length of healthy eyes is _______.


Write the name.

The part of human eye that transmits electrical signals to the brain.


Write the name.

The ability of lens to adjust the focal length as per need is


Write the name.

The screen with light sensitive cells in human eye.


The image of the object in the human eye is formed on the cross screen.


The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.


For a healthy human eye, the distant point is infinite distance.


Vision defect that increases distance between the lens of the eye and retina of the eye is termed as myopia.


Write an Explanation.

Minimum distance of distinct vision


Write scientific reason.

The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.


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.


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.


Write the function of the human eye and label parts of the figure given below.


Complete the paragraph by choosing the right options given below.

(minimum, near point, 25 cm, farthest, farthest distance, far point)

The _______ distance of an object from a normal eye, at which it is clearly visible without stress on the eye, is called the minimum distance of distinct vision. The position of the object at this distance is called the _______ of the eye, for a normal human eye, the near point is at _______. The _______ distance of an object from a human eye, at which it is clearly visible without stress on the eye is called _______ of distinct vision. The position of the object at this distance is called the _______ of the eye.


______ is tough and thick white sheath that protects the inner parts of the eye.


The larynx has fold of tissue which vibrate with the passage of air to produce sound.


Why the human eye is compared with camera?


Draw the struture of human eye and label its parts.


Shylesh is a school-going kid studying standard VIII. He is crazy about playing video games on mobile phones. After a couple of months, his eyes turned red and he felt severe pain in his eyes. His science teacher enquired about this and advised his parents to take him to an eye doctor.

  1. How does excessive usage of mobile phone affect our eyes?
  2. What are the values shown by the teacher?

In a myopic eye, the image of the object is formed


The muscular diaphragm that controls the size of the pupil is ____________.


The black opening between the aqueous humour and the lens is called ____________.


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.


A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?


A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. In which position mirror will be visible?

(A) (B)  (C) (D)

In the figure of the human eye, the cornea is represented by the letter


Name the part of the eye which gives colour to the eyes.


Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?


Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?


What kind of lens is there in our eyes? Where does it form the image of an object?


Write down the names of parts of the eye in the blank spaces shown in the figure.


The coloured portion of the eye is the ______.


The transparent membrane that keeps the eye moist is ______.


Match the following

1. Conjunctiva a. Coloured part of eye
2. Cornea b. Photosensitive layer
3. Iris c. Refraction
4. Retina d. Protection

What is ‘white of the eye’?


Describe the parts in the external structure of the eye.


Which one of the following statements is NOT correct? 


Select the option with incorrect identification:


The innermost layer of human eye is ______.


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

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

With reference to human eye, answer the following question.

What is aqueous humor?


With reference to human eye, answer the following question.

What is blind spot?


Match the following:

Column - I Column - II
1. Retina a. Pathway 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 f. Power of accommodation

Match the following:

  Column - I   Column - II
1 Retina a  pathway 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

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

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

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.


Share
Notifications



      Forgot password?
Use app×