A&P 1 Lecture Homework #7 Skin #1 (CHAPTER 5)

stratum granulosum

A splinter that penetrates to the third layer of epidermis of the palm is lodged in which layer? (Module 5.2D)

the epidermis

Accessory structures of the skin include all of the following except

contain increased numbers of free nerve endings.

All of the following are true of epidermal ridges except that they

the hypodermis is part of the dermis.

All of the following are true of the dermis EXCEPT that __________.

Thin skin has 4 layers and covers most of the body surfaces. Thick skin has 5 layers and covers the palms of the hands and soles of the feet.

Compare thin skin with thick skin. (Module 5.2A)

The superficial papillary layer contains areolar tissue with capillaries, lymphatic vessels, and sensory neurons. The deep reticular layer contains dense irregular connective tissue with collagen and elastic fibers.

Describe the layers of the dermis. (Module 5.4A)

A first-degree burn affects only the surface of the skin. A second-degree burn affects the whole epidermis and some of the dermis. A third-degree burn destroys the epidermis, the dermis, and extends into the subcutaneous layer.

Distinguish among a first-degree, second-degree, and third-degree burn. (Module 5.5A)

synthesis of vitamin C.

Each of the following is a function of the integumentary system except

dermis and epidermis

Identify the two major components of the cutaneous membrane. (Module 5.1A)

the melanosomes are more numerous

In dark-skinned individuals, __________.

Merkel cells

In the Stratum Basale, which specialized epithelial cells are sensitive to touch?

Stratum Basale

In which layer of skin are keratinocytes produced?

collagen and elastic fibers

Patterns established by these fibers determine the lines of cleavage.

Desmosomes

The keratinocytes are tightly connected with each other by

Stratum Basale.

The layer of dividing cells at the base of the epidermis is called.

Epidermis

The terms thick and thin refer to the relative thickness of which structure?

stratum corneum

The tough "horny" superficial layer of the epidermis is known as the

Keratinocytes

The type of most cells that form the strata in the epidermis are.

cutaneous membrane and accessory structures.

What are the two components of the integumentary system?

malignant melanoma

What is the most dangerous type of skin cancer?

Lamellated (Pacinian) corpuscles

Which sensory receptor is found in the deep layer of the dermis?

Third-degree burns because the tissue damage is so great that the tissue cannot repair itself.

Which type of burn usually requires skin grafting? Why? (Module 5.5B)

5

While walking barefoot on the beach, Joe stepped on a thorn that penetrated through the sole of his foot to the dermis. How many layers of epidermis did the thorn penetrate?

UV radiation stimulates melanocytes to produce more melanin.

Why does exposure to sunlight or sunlamps darken skin? (Module 5.3B)