Quiz 2

Question 1

Span of renewal of Stratum basale

Answer 1

15-30 days

Question 2

layer of the epidermis responsible for the regeneration of the other layers in the epidermis

Answer 2

Stratum Basale

Question 3

Binds the stratum basale to the basement membrane

Answer 3

Hemidesmosomes

Question 4

Thickest epidermal layer

Answer 4

Stratum spinosum

Question 5

Characteristic of cells composing the stratum spinosium

Answer 5

Polyhedral Keratinocytes

Question 6

Layer of skin synthesizing keratin

Answer 6

Stratum Spinosum

Question 7

Gives spiny appearance of stratum spinosum

Answer 7

desmosomes

Question 8

Makes up the Malphigian Layer

Answer 8

Stratum Basale and Spinosum

Question 9

Epidermal layer only found in thick skin

Answer 9

Stratum Lucidum

Question 10

What is Psoriasis vulgaris

Answer 10

Abnormal increase in number of proliferating cells in the basal layer

Question 11

Releases pigment to the keratinocytes

Answer 11

Melanosomes

Question 12

Depigmentation disorder resulting from degeneration and disappearance of entire melanocytes

Answer 12

Vitiligo

Question 13

Hereditary inability of melanocytes to synthesize melanin

Answer 13

Albinism

Question 14

Epithelial tactile cells abundant in fingertips and base of hair follicles

Answer 14

Merkel’s cells

Question 15

Two layers of dermis

Answer 15

Papillary and reticular

Question 16

Characteristic component of papillary layer

Answer 16

Loose CT

Question 17

Characteristic component of reticular layer

Answer 17

dense irregular CT

Question 18

Responsible for tone and texture of the skin

Answer 18

Dermis

Question 19

Responsible for skin elasticity

Answer 19

Reticular layer of dermis

Question 20

Regular lines of tension in the skin formed by collagen and elastic fibers

Answer 20

Langer’s Lines

Question 21

Gland classification of sebaceous gland according to morphology and mechanism of secretion

Answer 21

Simple Branched Acini, Holocrine

Question 22

Glad classification of sweat glands according to morphology

Answer 22

Simple coiled tubular

Question 23

Gland involved in adrenergic sweating

Answer 23

Apocrine glands

Question 24

Gland involved in cholinergic sweating

Answer 24

Eccrine glands

Question 25

Immature cartilage forming cells located at the periphery of the perichondrium

Answer 25

Chondroblasts

Question 26

Chondroblasts trapped in the matrix

Answer 26

Chondrocytes

Question 27

Mature cells surrounded by ECM that lie in lacunae

Answer 27

Chondrocytes

Question 28

Area immediately surrounding chondrocytes

Answer 28

Territorial matrix

Question 29

Most abundant inorganic component of bone

Answer 29

Calcium hydroxyapatite

Question 30

Hormone that stimulates bone matrix production

Answer 30

Parathyroid hormone (PTH)

Question 31

Differentiated osteoblasts surrounded by matrix enclosed with lacunae

Answer 31

Osteocytes

Question 32

Important in bone resorption and bone remodelling

Answer 32

Osteoclasts

Question 33

Hormone that activates bone digestion/resorption

Answer 33

Calcitonin

Question 34

Site of bone growth and resorption

Answer 34

Endosteum

Question 35

Released in acrosome reaction to digest zona pellucida

Answer 35

Acrosin

Question 36

Zona reaction

Answer 36

Inactivates sperm receptors which prevents polyspermy

Question 37

Post fertilization events

Answer 37

Pronucleus formation
Syngamy
Cleavage
Compaction
Morulation

Question 38

16-cell stage

Answer 38

Morula

Question 39

Forms placenta

Answer 39

Tropoblast

Question 40

Forms embryo

Answer 40

Embryoblast

Question 41

Forms amniotic cavity

Answer 41

Epiblast

Question 42

Divisions of extraembryonic mesoderm

Answer 42

Splanchnic

Somatic

Question 43

Determines body axes

Answer 43

Primitive Streak

Question 44

First cels to migrate inward in gastrulation that displace hypoblast cells aside

Answer 44

Endoderm

Question 45

Origin of neural crest

Answer 45

Ectoderm