Integumentary system

Question 1

What is integument?

Answer 1

Skin - an organ within the integumentary system

Question 2

What is the integumentary system?

Answer 2

skin + accessory organs (e.g. nails, hair, glands and sensory receptors)

Question 3

What are the 5 functions of the integumentary system?

Answer 3

1. Protection
2. Regulate body temperature
3. House sensory receptors
4. Synthesize Vitamin D
5. Excrete waste materials (perspiration)

Question 4

What is the most superficial layer of skin?

Answer 4

epidermis

Question 5

Of what is epidermis composed?

Answer 5

keratinized stratified squamous epithelium

Question 6

What are the 4 cell types of keratinized stratified squamous epithelium?

Answer 6

1. Keratinocytes
2. Melanocytes
3. Dendritic cells
4. Merkel cells/discs

Question 7

What is the predominate cell of keratinized stratified squamous epithelium? What does it do?

Answer 7

Keratinocytes

manufacture keratin

Question 8

What is keratin? What does it do?

Answer 8

structural protein, toughens and waterproofs surface of epidermis

Question 9

What is the role of melanocytes?

Answer 9

manufacture melanin (brown pigment)

Question 10

What does melanin do?

Answer 10

Helps to absorb UV radiation

Question 11

What are dendritic cells? What are 2 other names for dendritic cells?

Answer 11

immune cells

Langerhans cells, histocytes

Question 12

What are Merkel cells/discs?

Answer 12

Type I tactile mechanoreceptors

Question 13

What do Merkel cells/discs do?

Answer 13

discriminate touch

Question 14

In what ways can the integumentary system regulate body heat? (4)

Answer 14

1. Radiation (heat from subcutaneous blood vessels)
   2-3. Convection and Conduction ( heat through skin)
2. Evaporation (perspiration on skin surface)