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 shows multiple layers of cells with the uppermost layer being flat and scale-like. Which type of epithelium is this, and where is it commonly found?

Accepted Answer

Stratified squamous epithelium; skin epidermis

Question 3

Which intercellular junction is primarily responsible for preventing the passive flow of materials between epithelial cells?

Accepted Answer

Tight junction (zonula occludens)

Question 4

A gland releases its secretion by exocytosis without loss of cellular material. Which mode of secretion is this, and what is an example?

Accepted Answer

Merocrine; sweat gland

Question 5

Which of the following equations best represents Fick’s law of diffusion, which explains why simple squamous epithelium is ideal for gas exchange?

Accepted Answer

$$J = -D \frac{\Delta C}{\Delta x}$$

Question 6

Which tissue type is characterized by elongated contractile cells and is responsible for body movements?

Accepted Answer

Muscle tissue

Question 7

A patient has a genetic defect affecting connexons. Which cellular structure is most likely impaired, and what is a possible consequence?

Accepted Answer

Gap junctions; impaired intercellular communication

Question 8

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

Accepted Answer

Simple epithelium has one layer of cells; stratified has multiple layers

Question 9

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

Accepted Answer

Selective permeability and absorption

Question 10

A histological section shows cells with a rectangular outline, nuclei near the base, and microvilli on the apical surface. Which type of epithelium is this, and what is its main function in the small intestine?

Accepted Answer

Simple columnar; absorption

Question 11

Which of the following best describes the role of hemidesmosomes in epithelial tissue?

Accepted Answer

They bind epithelial cells to the underlying basal lamina

Question 12

Which type of epithelium is specialized for stretching and is found lining the urinary bladder?

Accepted Answer

Transitional epithelium

Question 13

A tissue sample from the trachea shows cells of varying heights, all touching the basement membrane, with cilia on the apical surface. What is this epithelium called?

Accepted Answer

Pseudostratified columnar

Question 14

Which of the following is a key distinguishing feature of glandular epithelium compared to covering epithelium?

Accepted Answer

Ability to secrete hormones or enzymes

Question 15

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 mechanical stress

Question 16

Which of the following best describes the main function of the basal lamina in epithelial tissues?

Accepted Answer

Acts as a selective filter and anchor for epithelial cells

Question 17

A patient presents with blistering of the skin due to a defect in desmosomes. Which function is most directly impaired?

Accepted Answer

Strong adhesion between epithelial cells

Question 18

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

Accepted Answer

Support and binding of other tissues

Question 19

Which of the following best describes the arrangement of nuclei in pseudostratified columnar epithelium?

Accepted Answer

Nuclei appear at different levels, giving a stratified appearance

Question 20

Which of the following equations would you use to calculate the surface area available for absorption in the small intestine, given the presence of microvilli?

Accepted Answer

$$A = n 	imes a_{microvillus}$$

Study Guide: Tissues and Epithelial Histology

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