Question 1

Which of the following best describes the main function of simple squamous epithelium in the alveoli of the lungs?

Accepted Answer

Rapid diffusion of gases

Question 2

A tissue sample from the lining of the urinary bladder shows cells that change shape when stretched. Which type of epithelial tissue is this?

Accepted Answer

Transitional epithelium

Question 3

Which of the following statements about epithelial tissue is TRUE?

Accepted Answer

Epithelial tissue is avascular but innervated, relying on diffusion from underlying connective tissue for nutrients.

Question 4

A gland that releases its product by exocytosis onto a body surface or into a body cavity, and has ducts, is classified as which type of gland?

Accepted Answer

Exocrine gland

Question 5

Which of the following best explains why epithelial tissues have a high rate of regeneration?

Accepted Answer

They are exposed to friction and hostile environments, requiring frequent replacement of damaged cells.

Question 6

A biopsy reveals a single layer of tall, closely packed cells lining the digestive tract, with some cells containing cilia. What is the most likely classification of this epithelium?

Accepted Answer

Simple columnar epithelium

Question 7

Which of the following is a function of microvilli found on the apical surface of some epithelial cells?

Accepted Answer

Increase surface area for absorption

Question 8

A patient has a genetic defect affecting the reticular lamina. Which of the following consequences is most likely?

Accepted Answer

Weakened support for the epithelial tissue due to compromised collagen fiber network

Question 9

Which of the following best describes the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands release hormones directly into the bloodstream, while exocrine glands secrete products through ducts onto surfaces.

Question 10

Which of the following equations best represents the relationship between the rate of diffusion ($$R$$), surface area ($$A$$), and thickness of the epithelial barrier ($$d) in $$simple squamous epithelium?

Accepted Answer

$$R = \frac{A}{d}$$

Question 11

A tissue sample from the skin shows multiple layers of flat cells with keratin present in the outermost layer. What is the most likely classification of this tissue?

Accepted Answer

Stratified squamous keratinized epithelium

Question 12

Which of the following is a characteristic feature of pseudostratified columnar epithelium?

Accepted Answer

Appears to have multiple layers due to nuclei at different levels, but all cells rest on the basement membrane

Question 13

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 a thick, protective barrier that can be sloughed off and replaced.

Question 14

Which of the following statements about the classification of epithelial tissues is CORRECT?

Accepted Answer

The first part of the name indicates the number of layers, and the second part indicates the shape of the cell in the apical layer.

Question 15

A patient with chronic bronchitis has excessive mucus production in the respiratory tract. Which type of cell is primarily responsible for this secretion?

Accepted Answer

Goblet cell

Question 16

Which of the following is a function of tight junctions between epithelial cells?

Accepted Answer

Prevent substances from passing between adjacent epithelial cells

Question 17

A multicellular exocrine gland with a branched duct and secretory units shaped like sacs is classified as which type of gland?

Accepted Answer

Compound alveolar (acinar)

Question 18

Which of the following best describes the role of the basal lamina in epithelial tissue?

Accepted Answer

It acts as an adhesive sheet anchoring epithelial cells to underlying connective tissue.

Question 19

A researcher is studying a tissue that lines the kidney tubules and is involved in absorption and secretion. Which type of epithelial tissue is most likely being observed?

Accepted Answer

Simple cuboidal epithelium

Question 20

Which of the following is a key difference between unicellular and multicellular exocrine glands?

Accepted Answer

Unicellular glands consist of a single cell (e.g., goblet cell), while multicellular glands consist of multiple cells organized into ducts and secretory units.

Epithelial Tissue: Structure, Function, and Classification

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