Exam 4 Part 1

Question 1

Integumentary system is made up of?

Answer 1

Skin + accessory organs (hair, nails, glands, & sensory organs)

Question 2

Functions of the integumentary system?

Answer 2

• Protective covering
• Regulation of heat
• Housing of sensory receptors
• Synthesis of vitamin D
• Excretion of waste materials (perspiration)

Question 3

How does skin eliminates excessive body heat?

Answer 3

• Radiation of heat through subcutaneous dilated blood vessels
• Conviction & conduction of heat directly through skin
• Evaporation of perspiration on surface of skin

Question 4

What are the layers of the skin?

Answer 4

Epidermis
Dermis
Subcutaneous layer ( hypodermis, superficial fascia)

Question 5

Epidermis is composed of _____ stratified squamous epithelium

Answer 5

Keratinized stratified

Question 6

Epidermis contains 4 types of cells, what are they?

Answer 6

• Keratinocytes cells
• Melanocytes cells
• Dendritic cells
• Merkel cells

Question 7

Predominate cell type; manufacture keratin

Answer 7

Keratinocytes

Question 8

Structural protein which toughens & waterproofs the surface of the epidermis

Answer 8

Keratin

Question 9

Manufacture melanin, brown pigment

Answer 9

Melanocytes

Question 10

Immune cells (aka Langerhans)

Answer 10

Dendritic cells

Question 11

Type 1 tactile mechanoreceptors (aka disc)

Answer 11

Merkel cells

Question 12

What are the 4 or 5 layers of the epidermis (5 depending on the thickness of the skin) Deepest to superficial

Answer 12

• Stratum Basale
• Stratum spinosum
• Stratum granulosum
• Stratum lucidum
• Stractum corneum

Question 13

Deepest layer, HIGHLY mitotic

Answer 13

Stratum basale

Question 14

Mitotic only in its deepest layers; begins synthesis of keratin

Answer 14

Stratum spinosum

Question 15

Stratum basale + stratum spinosum =

Answer 15

Stratum germinativum

Question 16

Flattened cells, filling up with keratin

Answer 16

Stratum granulosum

Question 17

Present ONLY in thick skin

Answer 17

Stratum lucidum

Question 18

20-30 layers of flattened, keratinized dead cells (skin you touch)

Answer 18

Stratum corneum

Question 19

Composed of connective tissue, housing muscle fibers, blood vessels, hair follicles, exocrine glands, & nerve fibers

Answer 19

Dermis

Question 20

What are the 2 layers of the dermis?

Answer 20

• Papillary layer

- Reticular layer

Question 21

Loose connective tissue directly underlying the epidermis

Answer 21

Papillary layer

Question 22

Dermal ridges (fingerprints) are due to the pulling of elastic fibers in the ______ layer

Answer 22

papillary layer

Question 23

Dense irregular connective tissue underlying the papillary layer

Answer 23

Reticular layer

Question 24

Layer that when over-stretched, this layer tears producing “stretch marks”

Answer 24

Reticular layer

Question 25

Adipose tissue & loose connective tissue, interlaced w/ blood vessels

Answer 25

Subcutaneous layer (hypodermis)

Question 26

T/F adipose tissue DOES NOT serve as a heat insulator & energy reservoir

Answer 26

False; It does

Question 27

Subcutaneous layer: conserves ______ _____ _____or impedes entrance of external heat

Answer 27

Internal body heat

Question 28

Binds skin to underlying organs

Answer 28

Subcutaneous layer (hypodermis)