Dermis & Hypodermis

Question 1

Dermis is located between

Answer 1

epidermis and hypodermis

Question 2

Two components of dermis

Answer 2

Superficial papillary layer

Deep reticular layer

Question 3

Dermis

Answer 3

It is the thick sensitive layer of skin or connective tissue beneath the epidermis.

Question 4

Structural components of dermis

Answer 4

Collagen and Elastin

Question 5

Protein responsible for skin strength

Answer 5

Collagen

Question 6

Protein responsible for skin elasticity

Answer 6

Elastin

Question 7

Collagen and Elastin are obtained from

Answer 7

Fibroblast cells

Question 8

Tissue found in papillary layer

Answer 8

Areolar tissue

Question 9

Dermal papillae projects between

Answer 9

epidermal ridges

Question 10

Tissue found in reticular layer

Answer 10

Dense irregular connective tissue

Question 11

Inflammation of the papillary layer are caused by

Answer 11

Infection
Radiation
Mechanical irritation
Chemicals

Question 12

Inflammation of the papillary layer are characterized by

Answer 12

Pain and itch

Question 13

Characteristics of skin

Answer 13

Strong( due to collagen fibers)
Elastic( due to elastic fibers)
Flexible

Question 14

Tissues in hypodermis

Answer 14

Elastic areolar and adipose tissues

Question 15

Hair Follicles

Answer 15

Organs that form the hairs.

Question 16

Location of hair follicles

Answer 16

Deep in the dermis.

Question 17

Hair follicles are wrapped in

Answer 17

Dense connective tissue sheath.

Question 18

Base of hair follicle surrounded by

Answer 18

Root hair plexus (sensory nerves)

Question 19

Accessory structures of hair

Answer 19

Arrector pili and sebaceous glands.

Question 20

Arrector pili

Answer 20

Involuntary smooth muscle

Question 21

Function of arrector pili

Answer 21

• Causes hairs to stand up.

- Produces goosebumps.

Question 22

Function of sebaceous glands

Answer 22

secrete sebum

Question 23

Regions of the Hair Structure

Answer 23

Hair root and Hair shaft

Question 24

Hair root

Answer 24

Lower part of the hair which is attached to the integument.

Question 25

Hair shaft

Answer 25

Upper part of the hair which is not attached to the integument.

Question 26

Hair shaft structures

Answer 26

Medulla Cortex Cuticle

Question 27

Medulla of hair shaft

Answer 27

- It is the Core | - The dead cells contain soft keratin and air to provide flexibility.

Question 28

Cortex of hair shaft

Answer 28

- It is the Middle layer | - The dead cells contain hard keratin to provide stiffness.

Question 29

Cuticle of hair shaft

Answer 29

- It is the Outermost layer | - The overlapping dead keratinized cells form shiny surface.

Question 30

Function of the Hair

Answer 30

- Head : -UV protection - Cushion from trauma - Insulation. - Nostrils, Ear canals, Eyelashes : -Prevent entry of foreign material. - Body Hair : -Sensory detection.

Question 31

Structure of Nails

Answer 31

Made of dead cells packed with keratin.

Question 32

Function of Nails

Answer 32

Protect fingers and toes.

Question 33

Where is Nail produced?

Answer 33

Occurs in a deep epidermal fold near the bone called the nail root.

Question 34

Describe the nail body.

Answer 34

The visible portion of the nail which covers the nail bed.

Question 35

Describe the lunula.

Answer 35

It is a pale crescent at the base of the nail.

Question 36

Describe the side of nails.

Answer 36

They lie in lateral nail grooves which are surrounded by lateral nail folds.

Question 37

About how many sweat glands does an adult has?

Answer 37

Between 1.6 to 4 million.

Question 38

Types of sweat glands

Answer 38

Eccrine sweat glands and Apocrine sweat glands

Question 39

Location of Eccrine sweat glands

Answer 39

They are found almost all over the surface of the body, and are most numerous on the palms and soles.

Question 40

Location of Apocrine sweat glands

Answer 40

They are located mainly in the armpit, genital area and around the nipples of the breasts.

Question 41

Location of sebaceous glands

Answer 41

They are found all over the body except on the palms, the soles, and the top of the feet.

Question 42

Where are sebaceous glands most numerous?

Answer 42

On the face and scalp.

Question 43

Sebaceous glands secrete

Answer 43

Sebum

Question 44

Function of Sebum

Answer 44

It lubricates the skin and hair and inhibits the growth of certain harmful bacteria.