Question

Enzyme present in lacrimal glands of the eye that has an immunological role is
A. Ligase
B. Lysozyme
C. Lipase
D. Lacriminase

Answer 1

Hint: This enzyme helps to kill bacteria from the eye, food in the mouth, etc. The enzyme is widely distributed in our body.

Complete Answer:
- Eyeball is made up of two segments, an anterior part, and a posterior part. The anterior part is small and forms one-sixth of the eyeball.
- The posterior part is larger and forms five-sixths of the eyeball. The posterior wall of this part is lined by a light-sensitive structure called the retina.
- The entire eyeball except for the anterior one-sixth is situated in a bony cavity known as an orbital cavity or eye socket.
- Eyeballs are attached to the orbital cavity by the ocular muscles. Eyelids cover the anterior one-sixth part of the eyeballs and protect the eyeball from foreign particles and cut-off the light during sleep. Conjunctiva is a thin mucus membrane, which covers the exposed part of the eye.
- The lacrimal gland is situated in the wall of the eye socket. From the lacrimal gland, tear flows over the surface of the conjunctiva and drains into the nose via lacrimal ducts. Due to its continuous secretion and lubrication, the conjunctiva is kept moist and is protected from infection. A tear contains lysozyme that kills bacteria.

So, the correct answer is C.
The enzyme present in the lacrimal glands of the eye that has an immunological role is lysozyme.

Note: Retina has specialized cells to help in vision in daylight as well as at night too. Rod cells and cone cells. Rod cells help the vision at night and cone cells help us to see in daylight.