Question

Stratum lucidum is found in

• A. Epidermis below stratum corneum
• B. Dermis
• C. Epidermis where root hair and follicles occur
• D. Dermis and secrete keratin

Answer 1

The correct option is A Epidermis below stratum corneum

Epidermis is the outer layer of the skin that is made of stratified squamous epithelium. It has no blood supply. Epidermis contains 4-5 strata. These are stratum corneum, lucidum, granulosum, spinosum and basale.

Stratum corneum is the outer, dead, flat, keratinized and thicker layer.

Stratum lucidum is next to stratum corneum. It consists of flat, translucent layers of cells. This stratum is found in thick skin only. Stratum granulosum lies just below stratum lucidum. The cells in this layer are in the process of keratinization.

Stratum spinosum is next down to stratum granulosum. The cells in this stratum have a polyhedral shape and they are in the process of protein synthesis.

Stratum basale rests on the basement membrane and it is the last layer of epidermis next to stratum spinosum. Stratum basale together with stratum spinosum constitute stratum germinativum.