L2: Histology I Flashcards
Elastic Connective Tissue is a type of:
A. dense regular connective tissue
B. dense irregular connective tissue
A. dense regular connective tissue
Where is elastic connective tissue found?
lung and skin
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
A. Dense Regular CT
Major cell type in dense regular connective tissue?
Fibroblast
Which type of connective tissue is found in tendons, ligaments, and shoulder joint?
A. Dense Regular CT
B. Elastic CT
C. Dense Irregular CT
A. Dense Regular CT
Which type of connective tissue connects bones to bone or muscle to bone?
A. Dense Regular CT
B. Elastic CT
C. Dense Irregular CT
A. Dense Regular CT
True or False: Dense Irregular CT contains less collagen fibers than ground substance
False - dense irregular CT contains more collagen fibers than ground substance
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
B. Dense Irregular CT
True or False: Loose (Areolar) CT has a great deal of ground substance and minimal collagen
True
Which type of connective tissue is well-vascularized and supports epithelium (lamina propria)?
Loose (Areolar) CT
True or False: Loose (Areolar) CT contains macrophages, mast cells, and fibroblasts
True
Are -blasts immature/mature? Active or not?
Are -cytes immature/mature? Active or not?
Blasts = immature = active
Cytes = mature = less active
How are connective tissues classified?
Proper
- Loose vs. Dense (Regular or Irregular)
Specialized
- Adipose, Bone, Blood, Cartilage
What does ECM contain?
Ground substance, fluid, glycoproteins, glycosamminoglycans (protein fibers + ground substance)
___ cells are NOT contiguous with one another but dispersed in abundant ECM produced by the cells
Connective tissue cells
Which organ has both endo and exocrine functions?
Pancreas
Two modalities of secretion for glandular epithelia?
1) Exocrine glands
- Merocrine
- Apocrine
- Holocrine
2) Endocrine glands
Simple tubular ducts are located in the:
A. intestine
B. stomach
C. mammary glands
A. intestine
Simple branched tubular ducts are located in the:
A. intestine
B. stomach
C. mammary glands
B. stomach
Example of unicellular gland?
Goblet cells of the small intestine
Composition of exocrine glands?
Duct + secretory unit
___ glands maintain connection to surface to reverse product into lumen of lining cavity
____glands detach from surface and reverse their products into the blood
Exocrine glands
Endocrine glands
True or False: Epithelial cells are highly proliferative
True
True or False: An example of stratified epithelium is that found in the testes, involved in spermatoza production
True
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
stamina cells; differentiated cells
True or False: umbrella cells make up transitional epithelium, which stretch and flatten
Tru
True or False: umbrella cells make up transitional epithelium, which stretch and flatten
True
What type of epithelium can either be keratinized or non-keratinized?
Stratified squamous!
True or False: Skin epidermis is non-keratinized
False - skin epidermis is keratinized
Which type of epithelium is often ciliated and located in respiratory/urinary systems?
Simple pseudostratified epithelium
Which type of epithelium is usually absorptive? secretory?
Absorptive = Columnar
Secretory = Cuboidal
Where is simple cuboidal epithelium often found?
A. Ovary and thyroid
B. Lining of intestine/gallbladder
A. Ovary and thyroid
Where is simple columnar epithelium (absorptive) often found?
A. Ovary and thyroid
B. Lining of intestine/gallbladder
B. Lining of intestine/gallbladder
When ___ epithelium lines vessels, it is called endothelium, and when it lines cavities (pericardium, pleura, or peritoneum) it is known as endothelium.
Simple squamous
What three junctions are found in the lateral and basal surface of the membrane?
1) Occluding Junction (prevents flow)
2) Anchorin Junctions
3) Gap junctions (encourage flow of molecules)
Most active epithelium? Least active epithelium?
Most active = Columnar
Least active = Squamous
What three structures can be found in apical cell surface of epithelial cell?
Which is the only motile one?
1) Microvilli
2) Cilia*
3) Sterocilia
True or False: Both microvilli and sterocilia increase cell surface and are non-motile
True
True or False: Sterocilia is located in testes while microvilli is located in intestine epithelium
TRue
True or False: epithelium is polarized, avascular, and contains basal lamina
True
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
B. Dense Irregular CT
Collagen fibers predominate in which connective tissue?
A. Loose CT
B. Dense CT
B. Dense CT
Which has more ground substance: loose or dense CT?
Loose CT
