Arkansas Esthetician Practice Exam

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Where are 'spiny' irregular shaped cells located in the skin?

Stratum basale
Stratum corneum
Stratum granulosum
Stratum spinosum

The correct answer is: Stratum spinosum

The 'spiny' irregular shaped cells refer to the keratinocytes in the stratum spinosum layer of the skin. These cells have a prickly appearance and are responsible for producing keratin, a tough structural protein that gives skin its strength. The other options are incorrect because A: Stratum basale is the deepest layer of the epidermis and contains basal cells which divide and produce new cells. B: Stratum corneum is the topmost layer of the epidermis and is made up of dead, flattened cells filled with keratin. C: Stratum granulosum is the layer above stratum spinosum and contains cells that produce keratin and contain granules that give skin its waterproofing properties.