L2: Histology I

Question 1

Elastic Connective Tissue is a type of:
A. dense regular connective tissue
B. dense irregular connective tissue

Answer 1

A. dense regular connective tissue

Question 2

Where is elastic connective tissue found?

Answer 2

lung and skin

Question 3

What type of connective tissue contain
1) thick collagen fibers that run parallel
2) fibroblasts nuclei lined up

A. Dense Regular CT
B. Dense Irregular CT
C. Elastic CT

Answer 3

A. Dense Regular CT

Question 4

Major cell type in dense regular connective tissue?

Answer 4

Fibroblast

Question 5

Which type of connective tissue is found in tendons, ligaments, and shoulder joint?
A. Dense Regular CT
B. Elastic CT
C. Dense Irregular CT

Answer 5

A. Dense Regular CT

Question 6

Which type of connective tissue connects bones to bone or muscle to bone?
A. Dense Regular CT
B. Elastic CT
C. Dense Irregular CT

Answer 6

A. Dense Regular CT

Question 7

True or False: Dense Irregular CT contains less collagen fibers than ground substance

Answer 7

False - dense irregular CT contains more collagen fibers than ground substance

Question 8

What type of connective tissue makes up the fibrous joint capsule and the submucosa of the digestive tract?
A. Dense Regular CT
B. Dense Irregular CT
C. Elastic CT

Answer 8

B. Dense Irregular CT

Question 9

True or False: Loose (Areolar) CT has a great deal of ground substance and minimal collagen

Answer 9

True

Question 10

Which type of connective tissue is well-vascularized and supports epithelium (lamina propria)?

Answer 10

Loose (Areolar) CT

Question 11

True or False: Loose (Areolar) CT contains macrophages, mast cells, and fibroblasts

Answer 11

True

Question 12

Are -blasts immature/mature? Active or not?

Are -cytes immature/mature? Active or not?

Answer 12

Blasts = immature = active
Cytes = mature = less active

Question 13

How are connective tissues classified?

Answer 13

Proper
- Loose vs. Dense (Regular or Irregular)

Specialized
- Adipose, Bone, Blood, Cartilage

Question 14

What does ECM contain?

Answer 14

Ground substance, fluid, glycoproteins, glycosamminoglycans (protein fibers + ground substance)

Question 15

___ cells are NOT contiguous with one another but dispersed in abundant ECM produced by the cells

Answer 15

Connective tissue cells

Question 16

Which organ has both endo and exocrine functions?

Answer 16

Pancreas

Question 17

Two modalities of secretion for glandular epithelia?

Answer 17

1) Exocrine glands
- Merocrine
- Apocrine
- Holocrine

2) Endocrine glands

Question 18

Simple tubular ducts are located in the:
A. intestine
B. stomach
C. mammary glands

Answer 18

A. intestine

Question 19

Simple branched tubular ducts are located in the:
A. intestine
B. stomach
C. mammary glands

Answer 19

B. stomach

Question 20

Example of unicellular gland?

Answer 20

Goblet cells of the small intestine

Question 21

Composition of exocrine glands?

Answer 21

Duct + secretory unit

Question 22

___ glands maintain connection to surface to reverse product into lumen of lining cavity

____glands detach from surface and reverse their products into the blood

Answer 22

Exocrine glands
Endocrine glands

Question 23

True or False: Epithelial cells are highly proliferative

Answer 23

True

Question 24

True or False: An example of stratified epithelium is that found in the testes, involved in spermatoza production

Answer 24

True

Question 25

Stratified epithelium often display different levels of cellular maturation, with more ___ cells located in the proximity of the basal lamina and more ___ cells closer to the surface

Answer 25

stamina cells; differentiated cells

Question 26

True or False: umbrella cells make up transitional epithelium, which stretch and flatten

Answer 26

Tru

Question 27

True or False: umbrella cells make up transitional epithelium, which stretch and flatten

Answer 27

True

Question 28

What type of epithelium can either be keratinized or non-keratinized?

Answer 28

Stratified squamous!

Question 29

True or False: Skin epidermis is non-keratinized

Answer 29

False - skin epidermis is keratinized

Question 30

Which type of epithelium is often ciliated and located in respiratory/urinary systems?

Answer 30

Simple pseudostratified epithelium

Question 31

Which type of epithelium is usually absorptive? secretory?

Answer 31

Absorptive = Columnar Secretory = Cuboidal

Question 32

Where is simple cuboidal epithelium often found? A. Ovary and thyroid B. Lining of intestine/gallbladder

Answer 32

A. Ovary and thyroid

Question 33

Where is simple columnar epithelium (absorptive) often found? A. Ovary and thyroid B. Lining of intestine/gallbladder

Answer 33

B. Lining of intestine/gallbladder

Question 34

When ___ epithelium lines vessels, it is called endothelium, and when it lines cavities (pericardium, pleura, or peritoneum) it is known as endothelium.

Answer 34

Simple squamous

Question 35

What three junctions are found in the lateral and basal surface of the membrane?

Answer 35

1) Occluding Junction (prevents flow) 2) Anchorin Junctions 3) Gap junctions (encourage flow of molecules)

Question 36

Most active epithelium? Least active epithelium?

Answer 36

Most active = Columnar Least active = Squamous

Question 37

What three structures can be found in apical cell surface of epithelial cell? Which is the only motile one?

Answer 37

1) Microvilli 2) Cilia* 3) Sterocilia

Question 38

True or False: Both microvilli and sterocilia increase cell surface and are non-motile

Answer 38

True

Question 39

True or False: Sterocilia is located in testes while microvilli is located in intestine epithelium

Answer 39

TRue

Question 40

True or False: epithelium is polarized, avascular, and contains basal lamina

Answer 40

True

Question 41

Which type of connective tissue is commonly found in the dermis and submucosa of hollow organs? A. Dense Regular CT B. Dense Irregular CT C. Adipose Tissue

Answer 41

B. Dense Irregular CT

Question 42

Collagen fibers predominate in which connective tissue? A. Loose CT B. Dense CT

Answer 42

B. Dense CT

Question 43

Which has more ground substance: loose or dense CT?

Answer 43

Loose CT