A&P Test 2

___% of the skin accounts for total body weight

The skin is composed of two district layers. Name them.

What is the outermost layer of the skin?

What is another name for the hypodermis?

What is the only layer of skin that is vascularized?

Because of its _____ composition, the hypodermis also acts as a ______ and an _______ that reduces heat loss.

What layer of the skin makes up the bulk?

Name the cells populating the epidermis

What fiber gives the epidermis its protective properties?

What cells make up keratin in the epidermis? What layer of the epidermis do they originate from?

Most epidermal cells are . . .

Keratinocytes are tightly connected by . . .

Which cells undergo  almost continuous mitosis in response to promoting by epidermis growth factor, a peptide produced by various cells throughtout the body

Persistent friction causes a thickening of the epidermis called a . . .

How are melanocytes described?

What pigment does melanocytes synthesis?

Melanin accumulates in membrane-bound granules called . . . that motor proteins move along actinfilaments to the end of the melanocytes's process

What is the function of melanosomes?

The melanosomes accumate on the superficial, or "sunny side" of the keratinocytes nucleus, forming . . .

What are star-shaped cells that arise from bone marrow and migrate to the epidermis?

Langerhans cells are another name for what cell epidermal cell?

What is the function of Dendritic cells?

Merkel cells are another name for what epidermal cell?

Describe tactile(Merkel) cells?

What are tactile(Merkel)cells' function?

Where can you find thick skin?

Name the 4(5 if thick skin) layers of the epidermis. Deep to superficial.

In thin skin, which covers most of the body, the _______layer appears to be absent and other strata are _______.

Where is the thickest skin in the body located?

What is the deepest layer in the epidermis?