Which epidermal layer is the granular layer with keratin-filled cells?

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Prepare for the Milady Electrology Exam. Utilize flashcards and multiple-choice questions with detailed explanations. Enhance your readiness for the exam.

Multiple Choice

Which epidermal layer is the granular layer with keratin-filled cells?

Explanation:
In the epidermis, the granular layer is the stratum granulosum. This layer is where keratinocytes accumulate keratin as they begin keratinization, and keratohyalin granules appear in the cytoplasm, giving the cells a granular look. These changes mark the transition from living, dividing cells in the deeper layers to the dead, keratin-filled cells of the outermost stratum corneum. The deeper basal layer contains proliferating cells, the spiny layer still has viable cells connected by desmosomes, and the outermost layer is composed of flattened, dead keratinocytes ready to shed.

In the epidermis, the granular layer is the stratum granulosum. This layer is where keratinocytes accumulate keratin as they begin keratinization, and keratohyalin granules appear in the cytoplasm, giving the cells a granular look. These changes mark the transition from living, dividing cells in the deeper layers to the dead, keratin-filled cells of the outermost stratum corneum. The deeper basal layer contains proliferating cells, the spiny layer still has viable cells connected by desmosomes, and the outermost layer is composed of flattened, dead keratinocytes ready to shed.

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