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What is major factor accounting for the waterproof nature of skin?
Glycolipid (lamellated granules) between stratum corneum cells.These granules accumulate in the keratinocytes of the stratum granulosum, and contain a waterproof glycolipid that is excreted into extracellular space helping to slow water loss across the epidermis.
What pigment is phagocytized by keratinocytes?
Melanocytes phagocytize melanin. First, melanocytes which are present in the lowest or basal layer of the epidermis, produce the pigment melanin. The melanin forms granules called melanosomes. After the keratinocytes take up the pigment, it clusters around the keratinocyte nucleus on the superficial side. This protects the DNA in the keratinocyte nucleus from damage due to UV radiation.
Which epidermal cells contain kerathyaline and lamellated granules?
Stratum granulosum Once again, stratum granulosum is one of epidermal layers: not epidermal cells. My answer to this question is: Flattened cells of stratum granulosum that are going through keratinization process contain kerathyaline and lamellated granules.
What does not belong waterproof elastin lamellated granules produced by keratinocytes?
Lamellated granules, the rest are proteins or produce proteins found in the skin.
Melanocytes and keratinocytes work together in protecting the skin from the UV damage when keratinocytes?
Accumulate the melanin granules on their superficial portion, forming a pigment that protects DNA from UV radiation
Where are lamellar granules produced?
in the the stratum granulosum cells of the epidermis.
In which layer of the epidermis are granules of keratohyalin formed?
stratum granulosum
What is cytocrine secretion?
Injection of secretory granules into neighboring cells Such as melanocytes injecting melanosomes to neighboring keratinocytes
Epidermal layer containing visible granules?
The epidermal layer containing visible granules is the stratum granulosum. This layer is responsible for the production of keratin and lipids, which help to strengthen and waterproof the skin. The granules observed in this layer are a result of the keratinocytes undergoing a process called keratinization.
What does not belong Intermediate filaments Keratin fibrils Keratohyaline Lamellated granules?
Keratin fibrils do not belong as they are a specific component of intermediate filaments found in epithelial cells, while keratohyaline and lamellated granules are associated with keratinization in the epidermis.
What are keratohyaline granules?
Keratohyaline granules are specialized structures found in the granular layer of the epidermis. These granules contain proteins like profilaggrin, which plays a crucial role in the formation of keratin fibers in the skin. As cells move towards the surface, these granules break down and release their contents, contributing to the development of a tough, protective barrier in the skin.
What are the steps to extrusion moulding?
Thermoplastic granules are added into a hopper, these granules fall into a Archimedes Screw and are push towards a steel dye. The hydraulic ram at the base of the screw forces the screw forwards to make sure all of the plastic has been extruded. At the end of the process you are left with a shape of a continuous cross section e.g. a pipe.
