5.1 Skin

1. The subcutaneous layer is also known as the _______.

• dermis

• epidermis

• Stratum Corneum

• stratum basale

• Hypodermis

Keratinized stratified squamous epithelium composes the

• 1. epidermis.

• 1. dermis.

• 1. hypodermis.

• 1. subcutaneous layer.

• 1. superficial fascia.

Choose the following statements that describe keratin.

           1. Keratin is a tough, fibrous protein.

           2. Keratin is used for pigmenting skin. 

           3. Keratin helps protect the skin.

           4. Keratin participates in immune responses.

           5. Keratin protects the skin from UV light. 

• 1. 1 and 3

• 1. 1, 3, 4, 5

• 1.  2, 4, 5

• 1. 1, 2, 3, 4, 5

• 1. 3 and 5

Which pigment secreted by specialized cells in the skin is capable of absorbing ultraviolet light?

• keratin

• melanin

• melatonin

• carotene

• hemoglobin

In a skin infection, which cell will take up and process microbial antigens?

• Intraepidermal macrophages

• Melanocytes

• Tactile epithelial cells (Merkel cells)

• Stem Cells

This layer is attached to the basement membrane by hemidesmosomes and to other cells by desmosomes. 

• Stratum basale

• Stratum spinosum

• Stratum granulosum

• Stratum lucidum

• Stratum corneum

Apoptosis of cells occurs within the 

• stratum basale

• stratum spinosum

• stratum granulosum

• stratum lucidum

• stratum corneum

Which statements are true? 

1. The majority of the skin does not contain stratum lucidum. 

2. Stratum lucidum is found in areas of high friction, such as the palms and soles. 

3. Live keratinocytes are located in the stratum lucidum. 

4. Friction will cause the stratum lucidum to form calluses. 

• 1, 2, 3, 4

• 1 and 4

• 2, 3, 4

• 1 and 2

• 3 and 4

Tactile epithelial cells are located in the  

• stratum basale.

• stratum spinosum.

• stratum granulosum.

• stratum lucidum.

• stratum corneum.

Areolar connective tissue will be found in the 

• hypodermis.

• basement membrane.

• epidermis.

• dermis.

• subcutaneous (subQ) layer.