2.01: integumentary System

Question 1

Function of the Skin

Answer 1

Protection, temperature regulation, sensory perception, excretion, and formulation of vitamin D

Question 2

Layers of the Epidermis

Answer 2

Stratum:
- Corneum, Lucidum, Granulosom, spinosum, Basal

Question 3

Where are keratinocytes found?

Answer 3

All strata

Question 4

Where are melanocytes found

Answer 4

Stratum Basale

Question 5

Where are Merkel Cells found?

Answer 5

Stratum Basale

Question 6

Where are Langerhan Cells found?

Answer 6

Stratum Spinosum

Question 7

Layers of Hair From most internal to external

Answer 7

Bulb ->Inner Root Sheath Cuticle -> Huxley’s -> Henle’s Layer -> external root sheath -> glassy membrane

Question 8

Pigments in Melancytes

Answer 8

Eumelanin (black/brown)
Pheomelanin (red/blonde)

Question 9

Phases of Hair growth

Answer 9

• Anagen (growth, years)
• Catagen (transition, weeks)
• telogen (resting/shedding, months)
• exogen (shedding)

Question 10

Clear Secretory Cell (eccrine sweat gland)

Answer 10

produces watery part of sweat

Question 11

Dark Secretory part of Eccrine Sweat Gland

Answer 11

Produces the glycoprotein part of sweat

Question 12

Myoepithelial Cells

Answer 12

Found in secretory portion of eccrine gland but not duct portion

Question 13

Duct portion of eccrine sweat glands

Answer 13

stratified cuboidal epithelium, no myoepithelium

Question 14

What is found in Hairy Skin?

Answer 14

Hair Follicles, Sebaceous, eccrine and apocrine sweat glands, pigment in epidermis

Question 15

Sebaceous gland morphology

Answer 15

Simple branched acinar

Question 16

eccrine sweat gland morphology

Answer 16

simple coiled tubular

Question 17

apocrine sweat gland morphology

Answer 17

simple coiled tubular

Question 18

External surface of Eyelid

Answer 18

Skin, Keratinized stratified squamous epithelium

Question 19

Internal surface of the eyelid

Answer 19

Palpebral conjuctiva (stratified columnar epithelium)

Question 20

Tarsal glands

Answer 20

• contains meibomian glands (modified sebaceous, simple branched acinar)
• produces meibum

Question 21

glands of zeis

Answer 21

modified sebaceous, unilobular
- associated with lash follicles

Question 22

Glands of moll

Answer 22

modified apocrine sweat glands,
- near lash follicles

Question 23

orbicularis oculi

Answer 23

facial expression muscle that encircles the eye

Question 24

Layers of Lens in order from most external to internal

Answer 24

lens capsule
Lens epithelium
Differentiating lens fibers
Mature lens fibers

Question 25

lens epithelium

Answer 25

simple cuboidal epithelium

Question 26

differentiating lens fibers

Answer 26

have nuclei, but are elongating, filling with crystallins

Question 27

Mature lens fibers

Answer 27

have no nuclei, densely packed

Question 28

Layers of Cornea

Answer 28

Anterior surface, Bowmans, stroma w/ collage, Descements, posterior surface

Question 29

Sclera

Answer 29

-continuous with cornea
- meats at corneoscleral junction
- not transparent

Question 30

Palpebral Conjuctiva

Answer 30

Covers posterior surface of eyelid
- stratified columnar
- goblet cells

Question 31

Bulbar conjuctiva

Answer 31

• covers anterior surface of sclera
• stratified squamous
• few goblet cells

Question 32

What is the anterior surface of the cornea made of

Answer 32

stratified nonkeratinized squamous epithelium

Question 33

What is the posterior surface of the cornea made of

Answer 33

simple squamos epithelium

Question 34

Where is stratum spinosum ONLY located

Answer 34

thick skin