Question 1

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

Accepted Answer

Facilitation of rapid gas exchange due to thinness

Question 2

A tissue sample from the urinary bladder shows cells that can stretch and change shape. Which type of epithelial tissue is most likely present?

Accepted Answer

Transitional epithelium

Question 3

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

Accepted Answer

Tight junctions

Question 4

A gland that releases its secretion by exocytosis without losing cellular material is classified as which type of exocrine gland?

Accepted Answer

Merocrine gland

Question 5

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

Accepted Answer

$$n = 1$$ \rightarrow$ simple epithelium

Question 6

Which specialized epithelial cell structure increases surface area for absorption in the small intestine?

Accepted Answer

Microvilli

Question 7

A patient has a genetic defect affecting gap junctions in cardiac muscle. Which function is most likely impaired?

Accepted Answer

Electrical impulse transmission between cells

Question 8

Which type of epithelial tissue lines the trachea and contains cilia to move mucus?

Accepted Answer

Pseudostratified columnar epithelium

Question 9

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

Accepted Answer

Cells are loosely arranged with abundant blood vessels

Question 10

A sweat gland releases its product by pinching off a portion of the cell membrane. Which method of secretion is this?

Accepted Answer

Apocrine

Question 11

Which equation best represents the total surface area ($$A) of $$microvilli on an epithelial cell, given $$n$$ microvilli each with surface area $$a$$?

Accepted Answer

$$A = n 	imes a$$

Question 12

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

Accepted Answer

It provides multiple layers for protection against physical stress

Question 13

Which type of glandular epithelium releases its entire cell as part of the secretion, as seen in sebaceous glands?

Accepted Answer

Holocrine

Question 14

A biopsy reveals an epithelial tissue with cells taller than they are wide, arranged in a single layer. Which type is this?

Accepted Answer

Simple columnar epithelium

Question 15

Which of the following is a function of glandular epithelium?

Accepted Answer

Secretion of hormones and enzymes

Question 16

If an epithelial tissue is classified by both shape and number of layers, which combination would describe the lining of kidney tubules?

Accepted Answer

Simple cuboidal epithelium

Question 17

Which equation would you use to calculate the total number of cells ($$N) in a $$stratified epithelium with $$l$$ layers and $$c$$ cells per layer?

Accepted Answer

$$N = l 	imes c$$

Question 18

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

Accepted Answer

Exocrine glands secrete onto epithelial surfaces; endocrine glands secrete hormones into the bloodstream

Question 19

A tissue sample from the esophagus shows multiple layers of flat cells. Which type of epithelial tissue is present?

Accepted Answer

Stratified squamous epithelium

Question 20

Which of the following is a real-world consequence of defective tight junctions in intestinal epithelial cells?

Accepted Answer

Uncontrolled passage of substances leading to leaky gut syndrome

Histology: Epithelial Tissue and Its Classification

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