MEDIUM
Earn 100

Which cells produce iodopsin?

Important Questions on Windows of Knowledge

EASY
Curvature of lens increases when viewing near objects.
EASY
 How do conjunctiva and tears protect the eye?
EASY
Eustachian tube amplifies and transmits the vibrations of tympanum to the internal ear.
EASY

Observe the illustration and answer the following questions.

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Name the cells (A) and (B).

EASY

Observe the illustration and answer the following questions.

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Explain the role of these cells in making vision possible.

EASY
Membranous labyrinth in the inner ear is filled with perilymph.
EASY
Find out the parts that are not related to retina from the following.
Photoreceptor, Yellow spot, Conjunctiva, Blind spot, Iris
EASY

Redraw the picture given below. Identify the name indicated and label the parts

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The part that adjusts its size as the intensity of light varies.

MEDIUM
The process that leads to the formation of impulses in photoreceptors is :
MEDIUM

Choose between the two options to answer the question specified in the brackets for the following.

An example is illustrated below.

Example: Corolla or Calyx (Which is the miter whorl?) Answer: Calyx

Sclerotic layer or choroid layer (Which one forms the iris?) 

MEDIUM

Observe the given steps related to the experience of taste and arrange them properly.

  • Impulses reach the brain through the nerves.
  • The taste detecting chemoreceptors are stimulated.
  • The substances reach the taste buds through saliva.
  • Substances responsible for taste dissolves in saliva.
  • Forms the experience of taste.
  • Impulses form in the chemical receptors.
EASY
Fill the blanks in the statement.
"Three types of cone cells are present in human eye. This is due to the chänge in _____  in the Opsin molecule"
EASY

Redraw the picture given below. Identify the name indicated and label the parts

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The part of Retina where plenty of photoreceptors are seen.

EASY
Vitreous humor is formed from blood, and is reabsorbed by blood.
EASY

Redraw the picture given below. Identify the name indicated and label the parts

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The part refracts light rays into the eye.

EASY

Name the following:

The layer of the eyeball that provide nourishment to the eye.

EASY

Observe the illustration and answer the following questions.

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How impulses are generated in these cells when light rays fall on it?

HARD
Give the biological reasons for the following statement:
We cannot distinguish colours in dim light.
EASY
Differentiate between the following pairs on the basis of what is mentioned within brackets:-
Rod cells and cone cells (pigment)
MEDIUM
Mention the functions of cones.