MICROANATOMY

EPITHELIUM CONNECTIVE TISSUE SKIN

INTEGUMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which layer of the epidermis is a layer of single cells that lays on the basement membrane of the dermis, continually dividing and pushing up toward the surface of the skin?
A
Stratum corneum
B
Stratum granulosum
C
Stratum spinosum
D
Stratum basale
Explanation: 

Detailed explanation-1: -The basal cell s continually divide, and new cells constantly push older ones up toward the surface of the skin, where they are eventually shed. The basal cell layer is also known as the stratum germinativum due to the fact that it is constantly germinating (producing) new cells.

Detailed explanation-2: -The basal cell layer (stratum basale, or stratum germinosum), is a single layer of cells, closest to the dermis.

Detailed explanation-3: -The stratum basale is a single layer of cells primarily made of basal cells. A basal cell is a cuboidal-shaped stem cell that is a precursor of the keratinocytes of the epidermis.

Detailed explanation-4: -The stratum basale is the innermost (or deepest) layer of the epidermis. It is separated from the dermis by a membrane called the basement membrane . The stratum basale contains stem cells-called basal cells-which divide to form all the keratinocytes of the epidermis.

There is 1 question to complete.