Epithelial Tissue

Question 1

Epithelial Tissue

Answer 1

• many cells tightly packed together ~ little to no extracellular matrix
• densely packed sheets of cells
• Many cell junctions
• Attach to basement membrane
• Avascular —no blood vessels - HAS a nerve supply
• Mitosis occurs frequently

Question 2

Apical (free) surface

Answer 2

faces outside world

Question 3

Lumen

Answer 3

hollow space (food , water)

Question 4

Basal surface

Answer 4

Bottom

Question 5

Basement Membrane

Answer 5

basal+reticular lamina ; formed by underlining epithelial + connective tissue

Question 6

Simple

Answer 6

1 layer of cells

Question 7

Pseudostratified

Answer 7

falsely; not every cell reaches apical surface, nucleus at different levels

Question 8

Stratified

Answer 8

2+ rows of cells

Question 9

Squamous

Answer 9

Flat “floor tiles”

Question 10

Cuboidal

Answer 10

Squared

Question 11

Columnar

Answer 11

Long columns

Question 12

Transitional

Answer 12

Functional classification, shape changes based on function

Question 13

Simple squamous function

Answer 13

• Filtration • Diffusion • Secretion

Question 14

Simple squamous location

Answer 14

• Cardiovascular + Lymphatic
• Serous membranes
• Alveoli
• Kidneys
• inner eardrum

Question 15

Simple cuboidal function

Answer 15

• Secretion • Absorption

Question 16

Simple cuboidal location

Answer 16

• Ovary
• Eye Lens
• Eye Retina
• Kidney tubules
• Thyroid gland
• Pancreas

Question 17

Simple cilliated columnar function

Answer 17

• Cilia —moves
mucus toward throat away from
lung; coughed up/ swallowed/spit out
• move oocytes from ovaries —> uterus

Question 18

Simple non-cilliated columnar function

Answer 18

• Absorption • Secretion

Question 19

PSUEDOSTRATISFIED CILLIATED COLUMNAR function

Answer 19

• Goblet cells Secrete mucus • Cilia sweeps away mucus

Question 20

PSUEDOSTRATISFIED CILLIATED COLUMNAR location

Answer 20

Respiratory tract

Question 21

PSUEDOSTRATISFIED NON-CILLIATED COLUMNAR function

Answer 21

• Absorption • Secretion

Question 22

PSUEDOSTRATISFIED NON-CILLIATED COLUMNAR location

Answer 22

• epididymis
• gland ducts
• male urethra

Question 23

Stratified squamous function

Answer 23

Protection

Question 24

Stratified squamous location

Answer 24

• Keratinized —
  • intracellular protein
• Non-keratinized —
  • deep ; moistened by
  mucus

Question 25

Stratified cuboidal function

Answer 25

• Protection • Secretion • Absorption

Question 26

Stratified cuboidal location

Answer 26

• Sweat gland • esophageal glands • male urethra

Question 27

Stratified columnar function

Answer 27

• Protection • Secretion

Question 28

Stratified columnar location

Answer 28

• urethra • esophageal glands • anal mucous membrane • conjunctiva of eye

Question 29

Translational function

Answer 29

• organs stretch • maintain lining • Holds varying fluid without rupturing

Question 30

Translational location

Answer 30

• urinary bladder • ureters • urethra

Question 31

Gland

Answer 31

a single cell or a mass of epithelial cells adapted for secretion

Question 32

Unicellular

Answer 32

Single cell

Question 33

Multicellular

Answer 33

Many cells

Question 34

Endocrine gland secretion

Answer 34

enter interstitial fluid + diffuse into bloodstream

Question 35

Exocrine gland secretion

Answer 35

enter ducts ; empty onto surface of epithelium

Question 36

Unbranched duct

Answer 36

Simple

Question 37

Branched duct

Answer 37

Compound

Question 38

Secretary portion Tubed shaped

Answer 38

Tubular

Question 39

Secretary portion Round shaped

Answer 39

Aciner

Question 40

Secretary portion Round + tube shape

Answer 40

Tubuloacinar

Question 41

Merocrine glands

Answer 41

released from cell in secretory vesicles via exocytosis

Question 42

Apocrine glands

Answer 42

portion of the cell pinches off by exocytosis

Question 43

Holocrine glands

Answer 43

As cell matures, it ruptures and becomes secretory product