MICROANATOMY

EPITHELIUM CONNECTIVE TISSUE SKIN

INTEGUMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A tough, fibrous protein that provides structural strength to the skin, hair, and nails.
A
collagen
B
kertin
C
elastin
D
melanin
Explanation: 

Detailed explanation-1: -Keratins are a group of tough, fibrous proteins that form the structural framework of certain cells, particularly cells that make up the skin, hair, and nails. Keratin 6c is found in the skin, although it is unknown which other tissues may produce this protein.

Detailed explanation-2: -Keratin is the major structural fibrous protein to form hair, wool, feathers, nails, and horns of many kinds of animals, and has a high concentration of cysteine, 7 to 20% of the total amino acid residues, that form inter-and intra-molecular disulfide bonds (Dowling et al., 1986).

Detailed explanation-3: -Keratinocytes (ker-uh-TIH-no-sites) make keratin, a type of protein that’s a basic component of hair, skin, and nails. Keratin in the skin’s outer layer helps create a protective barrier.

Detailed explanation-4: -Historically, the term ‘keratin’ stood for all of the proteins extracted from skin modifications, such as horns, claws and hooves. Subsequently, it was realized that this keratin is actually a mixture of keratins, keratin filament-associated proteins and other proteins, such as enzymes.

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