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1. What type of keratinocytes are found in the stratum granulosum?
- A single layer of columnar keratinocytes resting on a basement membrane.
- Multiple rows of dead, flat, enucleate keratinocytes - mostly comprised of cross-linked keratin fibres.
- Multiple rows of flattened keratinocytes containing keratohyalin granules and lamellar bodies.
- Multiple rows of clear, flat, dead, keratin-rich keratinocytes.
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2. What are desmosomes and what is their function?
- They are formed by protein plaques in the cell membrane and are linked by filaments. They link two adjacent cells together.
- Protein structures that regulate the shedding of skin.
- Formed by protein plaques in the cell membrane that provide the skin with structure.
- Formed by protein plaques in the cell membrane that prevent denucleation.
3. What type of keratinocytes are found in the stratum lucidium?
- Multiple rows of clear, flat, dead, keratin-rich keratinocytes.
- SIngle layer of columnar keratinocytes resting on a basement membrane.
- Multiple rows of closely packed, many sided keratinocytes linked by desmosomes.
- Multiple rows of dead, flat, enucleate keratinocytes - composed of cross-linked keratin fibres.
4. What type of keratinocytes are found in the stratum corneum?
- Multiple rows of closely packed, many sided keratinocytes tightly linked by desmosomes.
- Multiple rows of dead, flat, enucleate keratinocytes that are comprised of mostly cross-linked keratin fibres.
- A single layer of columnar keratinocytes resting on a basement membrane.
- Multiple rows of clear, flat, dead, keratin-rich keratinocytes.
5. What is the bottom layer of the skin called?
- Stratum granulosum
- Stratum spinosum
- Stratum basale
- Stratum lucidium
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