Integumentary System Pre-Test

Play an AI-generated podcast conversation about this lesson

What is the main function of the integumentary system?

To produce hormones

To produce epithelial cells

To protect the tissues lying within it (correct)

To regulate body temperature

What is the outer layer of the epidermis composed of?

Melanocytes

Flattened cells (correct)

Dead cells

Connective tissue fibers

What is the origin of the dermis in vertebrate skin?

Epithelium

Endoderm

Mesoderm (correct)

Ectoderm

What type of protein makes up the Stratum corneum?

Keratin (D) Signup and view all the answers

How many layers are present in the epidermis of human skin?

5 (B) Signup and view all the answers

What is the primary function of the stratum basale?

To act as the basement layer of the epidermis (C) Signup and view all the answers

What is the function of the papillae in the dermis?

To increase friction (C) Signup and view all the answers

What is the difference between epidermal and dermal skin derivatives?

Epidermal derivatives are derived from the epidermis, while dermal derivatives are derived from the dermis (A) Signup and view all the answers

What determines the color of human skin?

The presence of melanocytes (B) Signup and view all the answers

What type of glands are responsible for producing sweat?

Sweat glands (A) Signup and view all the answers

What is the importance of the integumentary system in maintaining homeostasis?

It regulates the ratio of water to salts in body fluids (C) Signup and view all the answers

What is the term for the ability of certain animals to change the color of their skin?

Metachrosis (D) Signup and view all the answers

On which parts of the human body are sweat glands not found?

Lips, glans penis, ear drum, and nail bed (B) Signup and view all the answers

What is the function of the oily secretion from sebaceous glands?

To keep the hair and skin smooth and soft, and impart an individual scent or odor (B) Signup and view all the answers

What is unique about the epidermis of agnathans?

It is unstratified and has abundant unicellular mucous glands (D) Signup and view all the answers

What is the origin of photophores in cartilaginous fishes?

Epidermal origin (B) Signup and view all the answers

What is the function of the toxin-secreting goblet cells in sting rays?

To secrete toxins (D) Signup and view all the answers

What causes the sandpaper texture of the skin of cartilaginous fish?

Placoid scales derived from the dermis (B) Signup and view all the answers

What is unique about the scales of some caecilians and a few toads?

They are embedded in the dermis (A) Signup and view all the answers

What is characteristic of the epidermis of reptiles?

The presence of epidermal scales, scutes, and plates (C) Signup and view all the answers

What is the shape of the scutes on the ventral surface of snakes?

Smooth, quadrilateral or polyhedral (D) Signup and view all the answers

What is the composition of the stratum corneum of crocodilians?

Warty and crested or non-overlapping scales (D) Signup and view all the answers

What is the arrangement of the epidermal scutes on the carapace of turtles?

In three groups: neurals, coastals, and marginals (A) Signup and view all the answers

What covers the limbs, tail, neck, and membrane connecting the carapace and plastron of turtles?

Small, non-overlapping epidermal scales (A) Signup and view all the answers

What is the characteristic of the skin of reptiles?

It is dry and granular. (B) Signup and view all the answers

What is the process called when snakes shed their entire outer stratum corneum in one piece?

Ecdysis (C) Signup and view all the answers

What type of feathers lie under the contour feathers in birds?

Plumulae (D) Signup and view all the answers

What is the part of the feather that is embedded in the skin?

Quill or calamus (C) Signup and view all the answers

What type of feathers are found on the wings of birds?

Remiges (C) Signup and view all the answers

Where are horny scales found in birds?

Only on the feet and base of the beak (B) Signup and view all the answers