Chapter 5: Problem 3

Many important skin structures are made of keratin. These include: hair,nails,foot pads, feathers,scales on reptiles

Short Answer

Expert verified

All the structures mentioned in the list: hair, nails, foot pads, feathers, and the scales on reptiles are made up of keratin.

Step by step solution

Recognizing Keratin structures

Keratin is a type of protein that is found in the epithelial cells of the skin. It is tough and insoluble, providing essential protection. Given the list of skin structures that includes: hair, nails, foot pads, feathers and scales on reptiles.

Analyzing each structure

Now, let's go through each structure individually to determine if it contains keratin. Starting with: \n• Hair: Hair is indeed made up of keratin. It's the foundation of the hair shaft.\n• Nails: Similar to hair, nails are also made up of keratin.\n• Foot Pads: The foot pads of animals are also keratin-based. The keratin provides the hardness and toughness needed for walking and running.\n• Feathers: The feathers of a bird are made up of keratin. It provides the feather with its basic structure and aids in flight.\n• Scales on reptiles: The scales on reptiles are formed from the outer layer of the skin containing keratin.

Conclusion

After analyzing, it is concluded that all the structures mentioned in the list are, indeed, made of keratin.

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Many important skin structures are made of keratin. These include: hair,nails,foot pads, feathers,scales on reptiles

Short Answer

Step by step solution

Recognizing Keratin structures

Analyzing each structure

Conclusion

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