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3 Cards in this Set
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True about keratinocyte is a) ectoderm derived cell b) present only in basal layer c) mature in basal layer d) differentiate in basal layer |
Answer (A) The principle cells of epidermis are Keratinocytes. Keratin filament is the hallmark of the Keratinocytes. It has following features: 1. Divide in basal layer 2. Differentiation occurs in stratum spinosum and stratum granulosum 3. completely mature and die in stratum corneum. So keratinocytes are present in all four layers of epidermis. Keratinocytes are derived from ectoderm |
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Odland bodies are seen in which layer of epidermis a) basal cell layer b) prickle cell layer c) stratum granulosum d) stratum corneum |
Answer c) stratum granulosum Odland bodies are membrane coated granules in stratum granulosum which contain lipids which is responsible for barrier function of this layer |
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Desmosomes are helpful in connecting a) keratinocytes b) melanocytes c) dermis and epidermis d) langerhans cells |
Answer (a) keratinocytes desmosomes are major adhesion complex in epidermis anchoring keratin intermediate filaments to cell membranes |
