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Skin Keratinization Process

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Questions and Answers

What percentage of cells in the epidermis are keratinocytes?

At least 90%

At least 70%

At least 60%

At least 80% (correct)

What is the main function of the keratin filaments in the keratinocytes?

To provide structural support to the cell (correct)

To facilitate cell division

To enable intercellular communication

To transport nutrients and organelles

Where are the basal cells located in the epidermis?

Dispersed throughout the epidermis

In the innermost layer (correct)

In the middle layer

In the outermost layer

What is the primary function of the basal cells in the epidermis?

To undergo mitotic division Signup and view all the answers

What is the purpose of the desmosomes in the epidermis?

To provide structural support and attachment between keratinocytes Signup and view all the answers

What distinguishing feature of the basal cells is mentioned in the text?

Their dark-staining oval or elongated nuclei Signup and view all the answers

What is the primary location of mitotically active cells in the epidermis?

Basal layer Signup and view all the answers

Which type of cells in the epidermis have a long lifespan and progress through the cell cycle very slowly?

Epidermal stem cells Signup and view all the answers

What are the membrane-bound organelles containing glycoproteins, glycolipids, and hydrolytic enzymes called?

Lamellar granules Signup and view all the answers

Which layer of the epidermis is composed of flattened cells holding abundant keratohyaline granules?

Granular layer Signup and view all the answers

Under what condition can hyperplasia occur in the epidermis?

Wounding Signup and view all the answers

What kind of layer is the most superficial layer of the epidermis, containing living cells?