Layers of Epidermis Quiz

Play an AI-generated podcast conversation about this lesson

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?

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?

Composition of keratin (correct)

Contain blood vessels

Ability to change colors

Presence of melanin

Which component is most likely NOT found in the dermis?

Melanocytes Signup and view all the answers

What is a common feature of the armor of crocodilians, some lizards, and parts of a turtle's shell?

Dermal bone composition Signup and view all the answers

Which of the following structures are composed of both epidermal (keratinized) and dermal components?

Antlers of mammals Signup and view all the answers

What is the function of the epidermis in vertebrates?

Gives rise to hair, feathers, claws, and hooves Signup and view all the answers

Which type of integument secretion is responsible for hardening the cuticle in insects?

Sclerotization Signup and view all the answers

Which layer of the arthropod integument secretes a complex cuticle made of chitin and protein?

Procuticle Signup and view all the answers

What is responsible for stiffening the cuticle in decapod crustaceans like lobsters?

Deposition of calcium carbonate Signup and view all the answers

Which invertebrate group has a soft epidermis containing a mucous gland for protection?

Arthropods Signup and view all the answers

What provides protection and skeletal support in arthropods?

Complex integument with a cuticle Signup and view all the answers

Which layer of the epidermis contains dead, keratinized cells that are shed as dandruff flakes?

Stratum corneum Signup and view all the answers

Which layer of the skin contains collagen and elastic fibers, and forms the dermal ridges that create fingerprints?

Papillary layer Signup and view all the answers

What is the primary component of hair that gives it its strength and rigidity?

Keratin Signup and view all the answers

Which of the following factors primarily determines hair texture?

Hair diameter Signup and view all the answers

What is the primary function of the nails?

Protection of the fingertips and toes Signup and view all the answers

Which layer of the epidermis is responsible for the production of new keratinocytes?

Stratum basale Signup and view all the answers