Question

Epithelial lining of cornea is composed of …………………… epithelium.
A. Non-keratinized stratified squamous
B. Transitional
C. Simple cuboidal
D. Simple squamous

Answer 1

It is a type of epithelium that has a thick layer. It can be sloughed off and it is usually replaced before the basement is exposed. They retain moisture and prevent desiccation and loss of water.

Complete step by step answer: The stratified squamous epithelium is made up of multiple layers of cells attached to the basement membrane on which some squamous cells are present in superficial layers. The underlying layers can be of columnar or cuboidal cells. It consists of multiple layers of cells and is commonly found in areas where mechanical and chemical abrasions and stress is more. It protects underlying structures from damage and harm. They are present in most of the systems where the body comes in contact with the external environment such as skin, respiratory, excretory, digestive and reproductive systems. They protect them from desiccation and water loss. Stratified squamous epithelium can be keratinized and non-keratinized. They also contain other types of cells. The thickness of this epithelium in the female vagina varies with hormone levels. In other organs, hormones do not influence its thickness. Non-keratinized stratified squamous epithelium is found in the cornea of the human eye that helps to prevent desiccation.
Hence, the correct answer is option A.

Note: Stratified squamous epithelium is commonly found in the upper surface of the tongue, hard palate, oesophagus, and anus. It is also present in the female reproductive system such as the vagina, cervix and labia majora. It forms a major part of the human integumentary system that is skin.