
Which cells produce iodopsin?
Important Questions on Windows of Knowledge



Observe the illustration and answer the following questions.
Name the cells (A) and (B).

Observe the illustration and answer the following questions.
Explain the role of these cells in making vision possible.


Photoreceptor, Yellow spot, Conjunctiva, Blind spot, Iris

Redraw the picture given below. Identify the name indicated and label the parts
The part that adjusts its size as the intensity of light varies.


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?)

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.

"Three types of cone cells are present in human eye. This is due to the chänge in _____ in the Opsin molecule"

Redraw the picture given below. Identify the name indicated and label the parts
The part of Retina where plenty of photoreceptors are seen.


Redraw the picture given below. Identify the name indicated and label the parts
The part refracts light rays into the eye.

Name the following:
The layer of the eyeball that provide nourishment to the eye.

Observe the illustration and answer the following questions.
How impulses are generated in these cells when light rays fall on it?

We cannot distinguish colours in dim light.

Rod cells and cone cells (pigment)


