Histology L2- Epithelium 1

1.

Name the following cell types.

Top

Middle

Bottom

Submit

2. Match the following descriptions of specialized apical structures with their names.

Associated with glycocalyx proteins, attach to the cytoskeleton with a terminal web cause Celiac's disease when compromised

Found in epididymis and vas deferens as well as the ear, longer branched structure

Highly motile, contains axoneme (9+2) arrangement of microtubules, insert into basal bodies

Submit

3. Match the following specific types of epithelial cell junction to its function.

occulding junction

anchoring junction

gap junction

Submit

4. Blood vessels penetrate the basement membrane. True or false?

True

False

The basement membrane functions as a semipermeable barrier that assists in the filtration of fluid and substances from underlying capillaries.

Explanation

The basement membrane functions as a semipermeable barrier that assists in the filtration of fluid and substances from underlying capillaries.

Submit

6. Basement membranes show up best with eosin stains?

True

False

The PAS stain is most effective.

Explanation

The PAS stain is most effective.

7. Match the following basic cell types with descriptions of their cellular morphology.

Nervous

Epithelium

Muscle

Connective

Submit

8. Match the following features of epithelial cells with their functions.

Basal surface

Apical surface

Lateral surface

Submit

9. Together the microvilli and the glycocalyax proteins form the ______ border of the intestinal epithelium.

The microvilli and glycocalyax proteins work together to form the brush border of the intestinal epithelium. The brush border is a specialized structure consisting of tiny finger-like projections called microvilli, which increase the surface area of the intestinal lining for better absorption of nutrients. The glycocalyax proteins are located on the surface of the microvilli and help protect and lubricate the epithelial cells. Together, they create the brush border, which is essential for the proper functioning of the intestinal epithelium.

Explanation

The microvilli and glycocalyax proteins work together to form the brush border of the intestinal epithelium. The brush border is a specialized structure consisting of tiny finger-like projections called microvilli, which increase the surface area of the intestinal lining for better absorption of nutrients. The glycocalyax proteins are located on the surface of the microvilli and help protect and lubricate the epithelial cells. Together, they create the brush border, which is essential for the proper functioning of the intestinal epithelium.

Submit

12.

A

B

C

D

E

Submit

13. Match the following types of epithelial cell junctions with their characteristics.

Tight junction

Zonula adherens (belt desmosome)

Macula adherens (spot desmosome)

Hemidesmosome

Gap junction

Submit

15. Which of the following does not derive from the mesoderm?

Notochord

Dermis of skin

Liver

Adrenal Cortex

All of the above do.

Liver derives from the endoderm.

Explanation

Liver derives from the endoderm.

16. The basement membrane attaches epithelial cells to underlying connective tissue. What is a common component this basement membrane?

The basement membrane is a thin layer of extracellular matrix that separates the epithelial cells from the connective tissue. It provides structural support and helps in the attachment of epithelial cells to the underlying tissue. Collagen is a common component of the basement membrane, as it is a major structural protein that gives strength and stability to tissues. Collagen fibers in the basement membrane contribute to its integrity and play a crucial role in maintaining the structural integrity of the epithelial tissue.

Explanation

The basement membrane is a thin layer of extracellular matrix that separates the epithelial cells from the connective tissue. It provides structural support and helps in the attachment of epithelial cells to the underlying tissue. Collagen is a common component of the basement membrane, as it is a major structural protein that gives strength and stability to tissues. Collagen fibers in the basement membrane contribute to its integrity and play a crucial role in maintaining the structural integrity of the epithelial tissue.

Submit

18. Which of the following choice(s) derive from the ectoderm?

Epidermis

Adrenal Medula

Adrenal Cortex

Thymus

The ectoderm is one of the three primary germ layers that develop during embryogenesis. It gives rise to various structures including the epidermis, which is the outermost layer of the skin. The adrenal medulla, which is responsible for producing adrenaline and noradrenaline, also derives from the ectoderm. Therefore, both the epidermis and adrenal medulla are correct choices that derive from the ectoderm.

Explanation

The ectoderm is one of the three primary germ layers that develop during embryogenesis. It gives rise to various structures including the epidermis, which is the outermost layer of the skin. The adrenal medulla, which is responsible for producing adrenaline and noradrenaline, also derives from the ectoderm. Therefore, both the epidermis and adrenal medulla are correct choices that derive from the ectoderm.

Submit