Histology MCQs/Skin



What is main function of Langergans cells of epidermis? + Antigen-presenting cells - Mechanoreceptors - Thermoreceptors - Stem cells
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{Which layer of epidermis has the most intense mitotic activity? + Basal layer - Spinous layer - Granular layer - Mitotic activity is equally distributed throuhg the epidermis
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{What are keratins? + Class of intermediate filaments in epidermis - Class of extracellular proteins in epidermis - Class of microfilaments in epidermis - Class of cell adhesions in epidermis
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{Keratohyaline granules: - They are non-membrane-bound and contain various lipids and glykolipids - They are membrane-bound and contain various lipids and glykolipids + They are non-membrane-bound and contain fillagrin - They are membrane-bound and contain fillagrin
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{How many layers of keratinocytes does usually contain stratum corneum? + 15-20 - 10-15 - 20-25 - 25-30
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{Melanin: - Melanin is stored mainly in proximity of cell nucleus of melanocytes - Melanin is quickly released from melanocytes to intercellular space + Melanin is quickly transported to keratinocytes of basal layer - Melanin is stored mainly in processes of melanocytes
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{Which aminoacid is main building block of melanin? - Glutamine + Tyrosine - Proline - Leucine
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{Which tissue is main tissue of papillary layer of dermis? - Reticular connective tissue + Loose connective tissue - Dense connective tissue - Reticular epithelium
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{Which tissue is main tissue of reticular layer of dermis? - Reticular connective tissue + Dense connective tissue - Loose connective tissue - Reticular epithelium
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{Proteoglycans of reticular layer of dermis are rich (especially) in one glycosaminoglycan. Which one? - Chondroitin sulfate + Dermatan sulfate - Keratan sulfate - Heparan sulfate
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{How is called part of the hair follicle containing vessels? - Inner root sheat + Dermal papilla - Hair cuticule - Medulla
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{Arrector pili muscle: - It is composed of striated muscle fibers - It is composed of striated muscle cells - It is composed of myoepithelial cells + It is composed of smooth muscle cells
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{Which structure is main structure of nails? - Gamma butyric acid (GABA) - Keratan sulfate - Hyaluronic acid + Keratin
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{Sebaceous glands: + They are often associated with hair follicle - They use merocrine type of secretion - They are branched tubular glands - They are abundant on palms
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{During produkci of sebum, autophagy plays an important role. What is an autophagy? - The cell disintegrates main part of its organelles using ubiquitine-proteaseome pathway + The cell surround part of its own cytoplasm and organells by membrane and digest it - Autophagy is a synonym for holocrine type of secretion - It's a trap, autophagy has nothing to do with production of sebum
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{Eccrine sweat glands are: - Straight tubular glands - Branched tubular glands - Branched acinar glands + Coiled tubular glands
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{Where are apocrine sweat glands? - In the skin of neck + In the axilla - In the soles - On the lips
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{How many vessel plexuses do we have in the dermis? - 0 - 1 + 2 - 3
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{What is main function of pacinian corpuscle (Vater-Paccini's corpuscle)? + Detection of pressure and vibrations - Detection of high temperature - Detection of low temperature - Detection of damage
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{Which structures of the skin are often nociceptors (receptors of pain)? - We have no receptors of pain in the skin - Krause end-bulb bodies + Free nerve endings - Merkel's disks
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