Home
Class 12
BIOLOGY
Vitamin-A is necessary for the proper p...

Vitamin-A is necessary for the proper physiological function of eye because

A

it is necessary for nerve impulses in retina

B

rhodopsin is made up of vitamin -A

C

oxidation of rhodopsin requires vitamin -A

D

none of the above .

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Role of Vitamin A in Eye Function:** - Vitamin A is essential for the proper functioning of the eye. It plays a critical role in the formation of rhodopsin, a light-sensitive pigment found in the retina. 2. **Structure of the Eye:** - The human eye consists of three main layers: - **Outer Layer:** Sclera - **Middle Layer:** Choroid - **Inner Layer:** Retina 3. **Photoreceptor Cells:** - The retina contains photoreceptor cells, which are crucial for vision. There are two types of photoreceptor cells: - **Rods:** Responsible for vision in low light conditions (twilight vision). - **Cones:** Responsible for color vision and function best in bright light (daylight vision). 4. **Rhodopsin and Vitamin A:** - Rods contain a pigment called rhodopsin (also known as visual purple), which is a combination of a protein and a derivative of Vitamin A. - Rhodopsin is essential for the conversion of light into nerve impulses, which are then transmitted to the brain. 5. **Conclusion:** - Since rhodopsin is made up of Vitamin A and is necessary for the proper physiological function of the eye, the correct answer to the question is that Vitamin A is necessary because rhodopsin is made up of Vitamin A. **Final Answer:** Vitamin A is necessary for the proper physiological function of the eye because rhodopsin is made up of Vitamin A. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

State one physiological function of zinc.

Physiologically functional part of wood is

Leaf perform both physical and physiological function in

Vitamin necessary for blood clotting is :

Functional systems for specific physiological functions are not seen in

A weter-logged soil is physiologically dry because of