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Questions and Answers
Which protein replaces cytoplasm in cells as they move upward?
Which protein replaces cytoplasm in cells as they move upward?
- Keratin (correct)
- Collagen
- Myosin
- Fibrin
What is the primary function of keratin in hair, hooves, and nails?
What is the primary function of keratin in hair, hooves, and nails?
- To provide toughness and rigidity (correct)
- To support internal organs
- To provide color
- To nourish the skin
What do reptile scales, bird feathers, and mammal hooves have in common?
What do reptile scales, bird feathers, and mammal hooves have in common?
- Composition of keratin (correct)
- Contain blood vessels
- Ability to change colors
- Presence of melanin
Which component is most likely NOT found in the dermis?
Which component is most likely NOT found in the dermis?
What is a common feature of the armor of crocodilians, some lizards, and parts of a turtle's shell?
What is a common feature of the armor of crocodilians, some lizards, and parts of a turtle's shell?
Which of the following structures are composed of both epidermal (keratinized) and dermal components?
Which of the following structures are composed of both epidermal (keratinized) and dermal components?
What is the function of the epidermis in vertebrates?
What is the function of the epidermis in vertebrates?
Which type of integument secretion is responsible for hardening the cuticle in insects?
Which type of integument secretion is responsible for hardening the cuticle in insects?
Which layer of the arthropod integument secretes a complex cuticle made of chitin and protein?
Which layer of the arthropod integument secretes a complex cuticle made of chitin and protein?
What is responsible for stiffening the cuticle in decapod crustaceans like lobsters?
What is responsible for stiffening the cuticle in decapod crustaceans like lobsters?
Which invertebrate group has a soft epidermis containing a mucous gland for protection?
Which invertebrate group has a soft epidermis containing a mucous gland for protection?
What provides protection and skeletal support in arthropods?
What provides protection and skeletal support in arthropods?
Which layer of the epidermis contains dead, keratinized cells that are shed as dandruff flakes?
Which layer of the epidermis contains dead, keratinized cells that are shed as dandruff flakes?
Which layer of the skin contains collagen and elastic fibers, and forms the dermal ridges that create fingerprints?
Which layer of the skin contains collagen and elastic fibers, and forms the dermal ridges that create fingerprints?
What is the primary component of hair that gives it its strength and rigidity?
What is the primary component of hair that gives it its strength and rigidity?
Which of the following factors primarily determines hair texture?
Which of the following factors primarily determines hair texture?
What is the primary function of the nails?
What is the primary function of the nails?
Which layer of the epidermis is responsible for the production of new keratinocytes?
Which layer of the epidermis is responsible for the production of new keratinocytes?
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