Question 1

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

Accepted Answer

Endoderm

Question 2

A tissue sample from the inner lining of blood vessels is examined under a microscope. The cells are thin and flat, arranged in a single layer. Which type of epithelial tissue is this?

Accepted Answer

Simple squamous epithelium

Question 3

Which of the following is a key function of ciliated simple columnar epithelium in the respiratory tract?

Accepted Answer

Propulsion of mucus and trapped particles

Question 4

Which cell junction type is primarily responsible for preventing leakage of extracellular fluid between epithelial cells?

Accepted Answer

Tight junctions

Question 5

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

Accepted Answer

Merocrine

Question 6

Which of the following best describes the basement membrane of epithelial tissue?

Accepted Answer

It consists of the basal lamina and reticular lamina.

Question 7

Transitional epithelium is uniquely suited for which function in the urinary bladder?

Accepted Answer

Stretching without rupturing

Question 8

Which formula correctly represents the calculation of surface area ($A$) for a cuboidal epithelial cell with side length $l$?

Accepted Answer

$A = 6l^2$

Question 9

A patient has a genetic defect affecting the proteins that form gap junctions in cardiac muscle. Which of the following is most likely impaired?

Accepted Answer

Electrical communication between cells

Question 10

Which type of epithelial tissue is most resistant to abrasion and forms the outer layer of skin?

Accepted Answer

Keratinized stratified squamous epithelium

Question 11

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

Accepted Answer

Contains abundant extracellular matrix

Question 12

Which specialization increases the surface area for absorption in intestinal epithelial cells?

Accepted Answer

Microvilli

Question 13

A multicellular gland with a branched duct and secretory units shaped like sacs is classified as:

Accepted Answer

Compound alveolar gland

Question 14

Which type of epithelial tissue lines the trachea and contains both cilia and goblet cells?

Accepted Answer

Pseudostratified columnar epithelium

Question 15

Which of the following best explains why simple squamous epithelium is found in alveoli of the lungs?

Accepted Answer

It allows rapid diffusion of gases.

Question 16

Which formula would you use to calculate the volume ($V$) of a columnar epithelial cell with height $h$ and base area $A$?

Accepted Answer

$V = h 	imes A$

Question 17

Which of the following is a function of non-keratinized stratified squamous epithelium?

Accepted Answer

Protection against abrasion and microbes

Question 18

Which type of gland releases its product by the rupture and death of entire secretory cells?

Accepted Answer

Holocrine

Question 19

Which of the following statements about stratified cuboidal epithelium is correct?

Accepted Answer

It consists of multiple layers of cube-shaped cells.

Question 20

A patient with a burn injury loses the integrity of their basement membrane in the skin. Which of the following consequences is most likely?

Accepted Answer

Impaired attachment of epithelial cells to underlying tissue

Epithelial Tissues: Structure, Classification, and Function

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