Integumentary System

Question 1

At beginning of the 2nd month of the embryo, the epidermis will divide into?

Answer 1

Periderm or epitrichium

Question 2

At what months does the epidermis acquire its definitive arrangements and its 4 layers be distinguished?

Answer 2

4th month

Question 3

It is the superficial layer and develops from surface ectoderm

Answer 3

Epidermis

Question 4

When will the cell of the periderm be cast off?

Answer 4

2nd trimester

Question 5

Rough scale like layer

Answer 5

Horny layer

Question 6

Develops from the underlying mesenchym

Answer 6

Dermis

Question 7

Layer responsible for the production of new cells

Answer 7

Basal layer

Question 8

Dermis is derived from mesenchyme. What are its three sources

Answer 8

1. Lateral plate mesoderm
2. Paraxial mesoderm
3. Neural creast cell

Question 9

On the 3rd to 4th month, this tissue, the _____, forms many irregular papillary structure called ______

Answer 9

Corium

Dermal papillae

Question 10

Buds from the germinative layer of the epidermis

Answer 10

Eccrine

Question 11

Deeper layer of dermis containing large Mount of fatty tissues

Answer 11

Subcorium

Question 12

Melanocytes are derived from?

Answer 12

Neural crest

Question 13

It develops from the down growth of epidermal cells into the underlying dermis

Answer 13

Hair

Question 14

Contains a capillary or sensory nerve end organ

Answer 14

Dermal papilla

Question 15

At birth, skin is covered by whitish paste

Answer 15

Vernix caseosa

Question 16

Cells in the center of the hair buds become spindle shaped and keratinized forming the ____

Answer 16

Hair shaft

Question 17

It is formed by the secretion from sebaceous glands and degenerated epidermal cells and hairs

Answer 17

Vernix caseosa

Question 18

The invagination called ____ are rapidly filled with mesoderm in which ______ develops

Answer 18

Hair papillae

Vessels and nerve endings

Question 19

Dual origin of the skin

Answer 19

Dermis and epidermis

Question 20

Dermal root sheath and arrector pili muscle are formed from __________

Answer 20

Mesenchyme

Question 21

Hair begins developing as solid epidermal proliferation from germinative layer penetrate underlying dermis. True or false?

Answer 21

True

Question 22

Sweat glands and mammary glands develop from ______

Answer 22

Epidermal proliferation

Question 23

Small bud at epithelial wall of hair follicle form ______

Answer 23

Sebaceous Glands

Question 24

Type of sweatglands from same epidermal buds that produce hair follicles

Answer 24

Apocrine

Question 25

At what months does the first hair grow and where?

Answer 25

End of 3rd month | Eye brows and upper lip

Question 26

First hair which are shed at birth are also called ____

Answer 26

Lanugo hair

Question 27

Single largest organ of the body

Answer 27

skin

Question 28

It is an epithelial layer of ectodermal origin

Answer 28

epidermis

Question 29

Loose connective tissue layer usually containing pads of adipocytes

Answer 29

Hypodermis or subcutaneous tissue

Question 30

It is a layer of mesodermal connective tissue

Answer 30

Dermis

Question 31

Layer consist mainly of stratified squamous keratinized epithelium

Answer 31

Epidermis

Question 32

Characterized by intense mitotic activity

Answer 32

basal layer

Question 33

Layer found only in thick skin, consist of translucent layer.

Answer 33

stratum lucidum

Question 34

Thickest layer and consist of generally polyhedral cells having central nuclei with nucleoli and cytoplasm actively synthesizing keratins.

Answer 34

Spinous layers

Question 35

Consist of fully keratinized or cornified cells called _____ that are continuously shed at the epidermal surface as the desmosomes and lipid rich cell envelopes break down

Answer 35

Squames | Stratum Corneum

Question 36

Consist of 3 to 5 layers of flattened cells now undergoing the terminal differentiation process of keratinization

Answer 36

Stratum granulosum

Question 37

Responsible for the color of the skin

Answer 37

melanocytes

Question 38

The first step in melanin synthesis is catalyzed by _____

Answer 38

Tyrosinase

Question 39

Considered are principal cells or parenchyma

Answer 39

keratinocytes

Question 40

Antigen presenting cells

Answer 40

Langerhans Cell

Question 41

Where can you find langerhan cells?

Answer 41

Stratum spinosum

Question 42

Sensitive mechanoreceptors essential for light touch sensation

Answer 42

Merkel cells

Question 43

Merkel cells are abundant in finger tips and some hair follicles. True or false?

Answer 43

True

Question 44

Provides flexible but strong base epidermis and binds it to the subcutaneous tissue

Answer 44

Dermis

Question 45

Considered paraneurons involved in sensory reception

Answer 45

Merkel cell

Question 46

Uppermost layer of dermis composed of fine collagen fibers and loose connective tissue

Answer 46

papillary dermis

Question 47

Subcutaneous layer of loose connective tissue beneath the dermis

Answer 47

hypodermis

Question 48

Lower layer of dermis composed of dense irregular connective tissue and contains blood vessels that are larger and deeper.

Answer 48

Reticular dermis

Question 49

Acts as an excretory organ by eliminating metabolic waste products

Answer 49

Sweat glands

Question 50

Begin functional activity at puberty

Answer 50

Apocrine sweat gland

Question 51

Type of tissue of reticular dermis

Answer 51

Dense irregular connective tissue

Question 52

Type of tissue of papillary dermis

Answer 52

Loose connective

Question 53

Characteristics of sebaceous gland

Answer 53

Holocrine form of secretion Mucous secretion Simple branched alveolar gland

Question 54

Characteristics of sweat glands

Answer 54

Sudoriferous gland | Simple, coiled tubular gland

Question 55

Found in axillae, areola, inguinal, and genital regions

Answer 55

Apocrine sweat glands

Question 56

Proximal end of the nail

Answer 56

Nail root

Question 57

Part of the nail that rest on a stratified squamous epithelium

Answer 57

Nail bed

Question 58

Part of the nail consist of dense keratinized plate

Answer 58

Nail plate

Question 59

The underlying nail root where nail growth occurs

Answer 59

Nail matrix

Question 60

White crescent shape at the base of the nail

Answer 60

Lunula

Question 61

Skin overlying root of nail

Answer 61

Nail fold

Question 62

Highly keratinized free edge of nail

Answer 62

Eponychium

Question 63

Skin beneath free end of nail

Answer 63

Hyponychium