Question 1

Which of the following best describes the function of tight junctions in epithelial tissues?

Accepted Answer

They form a seal that prevents substances from passing between adjacent cells.

Question 2

Which type of protein fiber in the extracellular matrix is primarily responsible for resisting tension and providing structural support?

Accepted Answer

Collagen fibers

Question 3

A patient presents with a genetic defect in desmosomes. Which tissue function is most likely to be compromised?

Accepted Answer

Mechanical integrity and resistance to physical stress

Question 4

Which equation best represents the relationship between the number of cell layers ($$n) $$and the rate of diffusion ($$D) $$across an epithelial tissue, assuming all other factors are constant?

Accepted Answer

$$D \propto \frac{1}{n}$$

Question 5

Which of the following is NOT a function of the extracellular matrix (ECM) in connective tissues?

Accepted Answer

Storing genetic information

Question 6

A researcher observes a tissue sample with cells arranged in a single layer, all of which are tall and column-shaped. Which type of epithelium is this?

Accepted Answer

Simple columnar epithelium

Question 7

Which of the following best explains why simple squamous epithelium is found lining blood vessels and alveoli?

Accepted Answer

It allows for rapid diffusion of gases and nutrients due to its thinness.

Question 8

Which component of the ground substance in the ECM is most responsible for trapping water and providing resistance to compression?

Accepted Answer

Proteoglycans

Question 9

A tissue sample is observed to have multiple layers of cells, with the apical layer consisting of flat, scale-like cells. What is the most likely classification of this epithelium?

Accepted Answer

Stratified squamous epithelium

Question 10

Which of the following cell junctions allows for the direct passage of ions and small molecules between adjacent cells, facilitating electrical and metabolic coupling?

Accepted Answer

Gap junctions

Question 11

Which function is most associated with the presence of cilia on the apical surface of epithelial cells?

Accepted Answer

Moving mucus and trapped particles across the epithelial surface

Question 12

Which of the following best describes the role of cell adhesion molecules (CAMs) in tissues?

Accepted Answer

They facilitate the binding of cells to each other and to the ECM.

Question 13

A tissue sample from the urinary bladder shows cells that can change shape and appear cuboidal when relaxed and squamous when stretched. What type of epithelium is this?

Accepted Answer

Transitional epithelium

Question 14

Which of the following equations best represents the relationship between the concentration of proteoglycans ($$[PG]) in $$the ECM and the tissue's ability to resist compression ($$C$$)?

Accepted Answer

$$C \propto [PG]$$

Question 15

Which type of epithelial tissue is best suited for absorption and secretion in the digestive tract?

Accepted Answer

Simple columnar epithelium

Question 16

Which of the following is a key distinguishing feature of pseudostratified columnar epithelium?

Accepted Answer

Cells appear to be in multiple layers, but all touch the basement membrane.

Question 17

Which of the following best explains why stratified squamous epithelium is found in areas subject to abrasion, such as the skin and esophagus?

Accepted Answer

It provides multiple layers of protection against mechanical stress.

Question 18

Which of the following is a function of reticular fibers in connective tissue?

Accepted Answer

Forming supportive networks for cells in organs like lymph nodes and spleen

Question 19

A patient with a mutation affecting the synthesis of elastin would most likely experience problems in which physiological process?

Accepted Answer

Stretching and recoiling of tissues such as lungs and arteries

Question 20

Which of the following best describes the difference between simple and stratified epithelia?

Accepted Answer

Simple epithelia consist of a single layer of cells, while stratified epithelia have two or more layers.

Histology: Introduction to Tissues and Epithelial Tissue

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