Question 1

Which embryonic germ layer gives rise to the epithelial lining of the digestive tract?

Accepted Answer

Endoderm

Question 2

A biopsy from the lining of the urinary bladder shows multiple layers of cells that can stretch and flatten. Which type of epithelial tissue is this?

Accepted Answer

Transitional epithelium

Question 3

Which of the following best describes the function of the basement membrane in epithelial tissues?

Accepted Answer

It connects the basal surface of epithelial cells to underlying connective tissue.

Question 4

A patient has a genetic defect affecting the formation of tight junctions in their intestinal epithelium. Which of the following is the most likely consequence?

Accepted Answer

Increased permeability of the intestinal lining to pathogens

Question 5

Which of the following is a characteristic unique to epithelial tissue compared to connective tissue?

Accepted Answer

Is avascular (lacks blood vessels)

Question 6

Which type of epithelial tissue is specialized for rapid diffusion and is found lining the alveoli of the lungs?

Accepted Answer

Simple squamous epithelium

Question 7

A gland that releases its secretion by exocytosis without losing any part of the cell is classified as which type?

Accepted Answer

Merocrine

Question 8

Which of the following best explains why stratified squamous epithelium is found in the skin and oral cavity?

Accepted Answer

It provides protection against abrasion and pathogens.

Question 9

Which cell junction type is primarily responsible for preventing the passage of substances between adjacent epithelial cells?

Accepted Answer

Tight junctions

Question 10

A researcher observes an epithelial tissue with all cells touching the basement membrane, but not all cells reach the apical surface. Which type of epithelium is this?

Accepted Answer

Pseudostratified columnar epithelium

Question 11

Which of the following best describes the function of microvilli on the apical surface of epithelial cells in the small intestine?

Accepted Answer

To increase surface area for absorption

Question 12

A patient presents with a skin disorder where the outermost layer of skin cells is not dead and keratinized. Which type of epithelium is most likely affected?

Accepted Answer

Keratinized stratified squamous epithelium

Question 13

Which of the following equations best represents the relationship between surface area ($$A$$), volume ($$V$$), and absorption rate ($$R) in $$epithelial tissues, assuming absorption rate is directly proportional to surface area?

Accepted Answer

$$R = k 	imes A$$

Question 14

Which of the following is a correct pairing of epithelial tissue and its primary function?

Accepted Answer

Simple squamous epithelium – diffusion and filtration

Question 15

A multicellular gland that releases its product by the entire cell rupturing and dying is classified as which type?

Accepted Answer

Holocrine

Question 16

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

Accepted Answer

They are exposed to frequent damage and need to replace lost cells rapidly.

Question 17

A patient with chronic bronchitis has impaired movement of mucus in their respiratory tract. Which epithelial specialization is most likely dysfunctional?

Accepted Answer

Cilia

Question 18

Which of the following statements about glandular epithelium is correct?

Accepted Answer

Exocrine glands secrete their products onto body surfaces or into body cavities.

Question 19

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

Accepted Answer

Simple epithelia have one layer of cells; stratified epithelia have multiple layers.

Question 20

A tissue sample from the trachea shows tall cells with cilia and goblet cells, but not all cells reach the apical surface. What is the most likely function of this tissue?

Accepted Answer

Secretion and movement of mucus

Epithelial Tissues: Structure, Classification, and Function

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