Question

Maximum power of division is found in the skin layer

• A. Stratum granulosum
• B. Stratum Malpighii
• C. Stratum spinosum
• D. Stratum corneum

Answer 1

Answer: (B)

Stratum Malpighii

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 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. The term Malpighian layer (stratum Malpighi) is defined as both the stratum basale and stratum spinosum. This is the most active zone for cell division and acts as a germ layer or germinal layer for development of cells of the epidermis.