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 such as O$$_2$$ and CO$$_2$$

Question 2

A biopsy from the lining of the urinary bladder reveals an epithelium that appears to change shape when stretched. Which type of epithelium is this?

Accepted Answer

Transitional

Question 3

Which of the following is NOT a characteristic of epithelial tissue?

Accepted Answer

It stores energy reserves

Question 4

A patient has a genetic defect affecting the formation of desmosomes. Which tissue function is most likely to be compromised?

Accepted Answer

Resistance to mechanical stress and stretching

Question 5

Which of the following best explains why the epidermis is composed of keratinized stratified squamous epithelium?

Accepted Answer

To protect underlying tissues from abrasion and dehydration

Question 6

Which type of epithelial tissue lines most of the digestive tract and is specialized for absorption and secretion?

Accepted Answer

Simple columnar

Question 7

A researcher observes a tissue with a single layer of cube-shaped cells lining a duct. What is the most likely function of this tissue?

Accepted Answer

Secretion and absorption

Question 8

Which of the following cell junctions allows ions and small molecules to pass directly between adjacent epithelial cells, facilitating communication?

Accepted Answer

Gap junctions

Question 9

A tissue sample from the trachea shows cells of varying heights, all attached to the basement membrane, with cilia on the apical surface. What is the most likely classification of this epithelium?

Accepted Answer

Pseudostratified ciliated columnar

Question 10

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

Accepted Answer

It provides a noncellular attachment site for epithelial cells to underlying connective tissue

Question 11

A patient with a burn injury loses the outermost layer of skin. Which type of epithelial tissue has been damaged?

Accepted Answer

Stratified squamous keratinized

Question 12

Which of the following is a function of epithelial tissue that is NOT shared by connective tissue?

Accepted Answer

Secretion of hormones

Question 13

A histological slide shows multiple layers of cells with the apical layer being flat and alive, found lining the esophagus. What is the most likely type of epithelium?

Accepted Answer

Stratified squamous non-keratinized

Question 14

Which of the following best explains why transitional epithelium is found in the urinary bladder?

Accepted Answer

It permits repeated cycles of stretching and recoiling without damage

Question 15

Which of the following equations best represents the relationship between the number of cell layers ($$n) $$and the classification of epithelial tissue?

Accepted Answer

$$n = 1$$ indicates simple epithelium; $$n \u003e 1$$ indicates stratified epithelium

Question 16

A gland that releases its product through a duct onto an epithelial surface is classified as which type of gland?

Accepted Answer

Exocrine gland

Question 17

Which of the following best describes the polarity of epithelial cells?

Accepted Answer

They have distinct apical and basal surfaces with different structures and functions

Question 18

A tissue sample from a sweat gland duct shows two layers of cube-shaped cells. What is the most likely classification of this epithelium?

Accepted Answer

Stratified cuboidal

Question 19

Which of the following is a key difference between simple columnar and pseudostratified columnar epithelium?

Accepted Answer

Pseudostratified columnar appears to have multiple layers due to nuclei at different heights, but all cells touch the basement membrane

Question 20

Which of the following best explains why epithelial tissues are avascular?

Accepted Answer

They rely on diffusion from underlying connective tissue for nutrients and waste removal

Tissues: Structure, Classification, and Function in Human Anatomy & Physiology

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