Epidermis - Quiz
A) After birth B) Before neurulation C) After neurulation D) During the formation of the stratum corneum
A) Two-layered B) One-layered C) Three-layered D) Cornified
A) Stratum germinativum B) Stratum spinosum C) Stratum corneum D) Embryonic periderm
A) Embryonic periderm B) Stratum germinativum C) Stratum granulosum D) Malpighian layer
A) Stratum corneum B) Stratum granulosum C) Stratum spinosum D) Embryonic periderm
A) Malpighian layer B) Periderm C) Cornified layer D) Granular layer
A) Robert Hooke B) Louis Pasteur C) Marcello Malpighi D) Gregor Mendel
A) Dermal layer B) Stratum granulosum C) Embryonic periderm D) Stratum corneum
A) Yes B) No C) Only after birth D) Only during stress
A) Periderm cells B) Keratinocytes C) Fibroblasts D) Glucocorticoids
A) Stratum corneum B) Stratum granulosum C) Stratum germinativum D) Stratum spinosum
A) Round spheres B) Elongated fibers C) Cube-shaped D) Flattened sacks
A) They have no nuclei B) At one end of the cell C) Scattered throughout D) In the exact center
A) 100 – 200 milligrams B) 1 – 5 grams C) 30 – 90 milligrams D) 10 – 20 milligrams
A) 0.01 - 0.05 grams B) 0.720 - 2.16 grams C) 20.0 - 50.0 grams D) 5.0 - 10.0 grams
A) Paracrine growth factor B) Endocrine growth factor C) Inhibitory growth factor D) Autocrine growth factor
A) Stimulate their own division B) Stop cell division C) Regulate dermal fibroblasts D) Produce keratin granules
A) FGF2 B) FGF7 C) TGFβ D) TGFα
A) Autocrine growth factor B) Paracrine growth factor C) Hormonal factor D) Endocrine growth factor
A) Embryonic periderm B) Stratum granulosum C) Underlying dermal fibroblasts D) Stratum corneum
A) Production of sweat B) Proliferation of basal cells C) Hydration of the stratum corneum D) Shedding of skin flakes
A) High water content B) Autocrine growth factors C) Loose fat deposits D) Cytoskeletal proteins linked to cell-cell junctions
A) Loose cellular junctions B) Glucocorticoids C) High external humidity D) Highly organized lipids, acids, hydrolytic enzymes, and antimicrobial peptides
A) Non-pathogenic microorganisms B) Chemical barrier C) Immunologically active barrier D) Physical barrier
A) It increases B) It remains constant C) It drops D) It fluctuates wildly
A) 7.0 B) 5.0 C) 3.0 D) 9.0
A) By absorbing UV light B) By breaking down keratinocytes C) By competing for food and producing inhibitory chemical secretions D) By increasing skin pH
A) Adrenaline B) Glucocorticoids C) Thyroxine D) Insulin
A) It increases cell division B) It strengthens it C) It compromises it D) It has no effect
A) Gradual temperature drops B) Changes in atmospheric pressure C) Exposure to UV light D) Sudden and large shifts in humidity
A) Bone fractures B) Severe trauma C) Minor injury D) Internal organ failure
A) UV light B) Infrared heat C) Radio waves D) X-rays
A) Hypodermis B) Basement membrane C) Epidermis D) Dermis
A) 1000 μm B) 596.6 μm C) 31.2 μm D) 90 μm
A) Simple squamous epithelium B) Stratified squamous epithelium C) Pseudostratified epithelium D) Simple columnar epithelium
A) Dermal blood vessels via direct contact B) Diffused oxygen from surrounding air C) Arterioles and venules D) Blood capillaries inside the layer
A) Melanocytes B) Cadherins C) Keratins D) Corneodesmosomes
A) About 5 layers B) About 50 layers C) About 2 layers D) About 15 layers
A) Plasma membrane B) Rete ridges C) Basement membrane D) Lamellar bodies
A) Rete ridges B) Cadherins C) Hemidesmosomes D) Corneodesmosomes
A) They remain stationary B) They move inward C) They are displaced outward D) They divide into stem cells
A) Loss exceeds production B) They are completely independent C) Production equals loss D) Production exceeds loss
A) A few hours B) About two weeks C) An additional four weeks D) About 48 days
A) A protein concentration gradient B) A temperature gradient C) A calcium gradient D) A sodium gradient
A) The shedding of squamous sheets B) The rate of cell division C) The calcium gradient D) The secretion of melanin
A) Extracellular melanin B) Blood plasma proteins C) Keratin filaments D) Intracellular stores
A) Intracellular sodium receptor B) Voltage-gated potassium receptor C) Extracellular calcium-sensing receptor D) Light-sensitive photoreceptor
A) Corneometry B) Biopsy C) Melanometry D) Keratometry
A) Keratinocytes B) Stratum corneum C) Merkel cells D) Melanocytes
A) Into chemical gradients B) Into melanin pigments C) Into lipid barriers D) Into electrical signals
A) A benign condition simulating squamous cell carcinoma B) A localized lack of melanocytes C) Diffuse epidermal hyperplasia D) Thickening of the stratum corneum only
A) A black, poorly defined, velvety hyperpigmented acanthosis B) A localized thickening of the stratum corneum C) Irregular squamous strands extending down into the dermis D) Multiple white to pinkish papules in the oral cavity
A) Pseudoepitheliomatous hyperplasia B) Acanthosis nigricans C) Squamous cell carcinoma D) Heck's disease
A) Acanthosis nigricans B) Heck's disease C) Pseudoepitheliomatous hyperplasia D) Diffuse acanthosis
A) Only in white and Asian skin B) Only after UV exposure C) Yes D) No |
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