Test
Epidermis
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Preguntas del test (26)
1Put the layers of the epidermis in order
A- Stratum Corneus
B- Stratum Basalum
C- Stratum Granulosum
D- Straturm Spinosum- AB-D-C-A
- BA-B-C-D
- CD-B-A-C
2Which of the following stratum basale cells are associated with sensory nerves?
- AMerkel cell
- BMelanocyte
- CBasal cell
3How much of the stratum basale is made of melanocytes?
- A8-10%
- B12-16%
- C20-23%
4Which of the following has dentritic projections?
- ABasal cells
- BMelanocytes
- CMerkel cells
5What are produced by melanocytes?
- AMelanin
- BMelanosomes
- CMelanodesmosomes
6Which of the following cells are actively dividing?
- ABasale
- BMelanocytes
- CLangerhans
7What happens to melanocytes to cause sunburn?
- AHigh UV causes melanosome overproduction
- BHigh UV causes melanocyte apoptosis
8How do melanosomes work?
- AWhen exposed to UV, they form a 'cap' over the nucleus
- BWhen exposed to UV, the burst, spreading melanin throughout the cell
- CWhen exposed to UV, they destroy UV damaged proteins
9Which receptor activates under UV, increasing melanosome production?
- AMCR1
- BMC2
- CMCR3
10What enzyme converts tyrosine to dopaquinone?
- ATyrosinase
- BDopaquinone synthase
11Which of the following are used in determining skin colour?
- ARed phaemelanin
- BBlack eumelanin
- CBrown pheumelanin
- DPink leumelanin
12How many layers of cells are in the stratum spinosum?
- A8-10
- B4-6
- C6-8
13How are cells in the stratum spinosum held together?
- ADesmosomes
- BCollagen
- CMyosin fibres
14What is different about stratum spinosum cells compared to stratum spinosum cells?
- AThe cytosol has shrunk somewhat
- BThe keratin is coarser
- CThe nucleus has begun to disintegrate
- DThe cytosol has swelled
15What is the role of langerhans cells?
- AAntigen presenting cells
- BPhagocytic cells
- CSensory cells
16Where are Langerhans cells found in the epidermis?
- AStratum spinosum
- BStratum basalum
- CStratum granulosum
17Where is the 'lipid glue' that holds the stratum corneum produced?
- AStratum spinosum
- BStratum granulosum
18How many layers are present in the stratum granulosum?
- A3-5
- B12-15
- C23-24
19Why does the nucleus begin to disintegrate in the stratum granulosum?
- AThey're undergoing apoptosis
- BThe cells are too far from the nutrient source to sustain it
20What protein organises the laying down of keratin fibres?
- AKeratohyalin
- BKeratosynthase
- CKeratoconstructase
21Why is the stratum corneum made of keratinocytes?
- AThey're waterproof
- BThey provide UV protection
- CThey can be lost easily
22How long does it take a cell to reach the stratum corneum?
- A12
- B14
- C16
23What is psoriasis?
- AWhen cell turnover is too rapid (5-10 days)
- BWhen cell turnover is too slow (20-30 days)
- CForms thick callouses
24How many layers make up the stratum corneum?
- A20-35 layer
- B35-40
- C40-45
25What distinguishes stratum corneum cells?
- ANo nucleus
- BHeld together by desmosomes
- CKeratin only
- DShed within 3 days
26How thick is the stratum lucidum?
- A1-3 layers
- B2-4 layers
- C4-6 layers
Información
- Descripción
- (The Skin) Haematology and Anatomy Test sobre Epidermis, creado por gina_evans0312 el 12/11/2013.
- Autor
- gina_evans0312
- Idioma
- English
- Visitas
- 971
- Historial
- Creado el 12 nov 2013 · actualizado el 31 ago 2016
- Etiquetas
- Valoración
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