Question 1

Which of the following best explains why epithelial tissue is avascular but still able to survive and function effectively?

Accepted Answer

Epithelial tissue is always located next to vascular connective tissue, allowing nutrients and waste exchange via diffusion across the basement membrane.

Question 2

A patient suffers from chronic acid reflux, causing repeated damage to the lining of the esophagus. Which property of epithelial tissue is most critical for repair in this scenario?

Accepted Answer

High rate of cell division to renew and repair tissue.

Question 3

Which of the following cell junctions is primarily responsible for preventing the movement of substances between adjacent epithelial cells, thus maintaining a selective barrier?

Accepted Answer

Tight junctions

Question 4

The apical surface of epithelial tissue may contain specialized structures. Which of the following is a correct pairing of structure and function?

Accepted Answer

Microvilli – increase surface area for absorption

Question 5

Which equation best represents the rate of diffusion of nutrients from connective tissue to epithelial cells, assuming Fick's law applies?

Accepted Answer

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

Question 6

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

Accepted Answer

Production of red blood cells

Question 7

A researcher is studying the permeability of different epithelial tissues. Which type of cell junction would she focus on to understand why some epithelia are 'leaky'?

Accepted Answer

Tight junctions

Question 8

Which layer of the basement membrane is produced by epithelial cells and contains glycoproteins?

Accepted Answer

Basal lamina

Question 9

A mutation disrupts the formation of hemidesmosomes in epithelial cells. What is the most likely consequence?

Accepted Answer

Impaired adhesion of epithelial cells to the basement membrane

Question 10

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

Accepted Answer

Epithelial cells have distinct apical and basal surfaces, with specialized functions at each.

Question 11

Which of the following scenarios best illustrates the filtration function of epithelial tissue?

Accepted Answer

Movement of water and solutes across kidney tubule epithelium under pressure

Question 12

Which of the following is TRUE regarding the innervation of epithelial tissue?

Accepted Answer

Epithelial tissue is innervated, allowing for perception of touch, pain, and control of glandular secretion.

Question 13

Which of the following best explains why epithelial tissue is found at sites of nutrient absorption?

Accepted Answer

Epithelial tissue has a high rate of cell division and specialized apical features such as microvilli to increase surface area for absorption.

Question 14

Which of the following is a correct statement about the basement membrane?

Accepted Answer

It consists of the basal lamina (from epithelial cells) and reticular lamina (from connective tissue).

Question 15

A patient has a genetic defect affecting the collagen in the reticular lamina. Which function of the basement membrane is most likely to be compromised?

Accepted Answer

Diffusion barrier between connective tissue and epithelium

Question 16

Which of the following is TRUE regarding the relationship between epithelial and connective tissue?

Accepted Answer

Epithelial tissue relies on the close proximity to vascular connective tissue for nutrient and waste exchange.

Question 17

Which of the following is a real-world example of the protective function of epithelial tissue?

Accepted Answer

The skin acting as a barrier against pathogens and physical injury.

Question 18

Which of the following cell junctions allows for the passage of ions and small molecules between adjacent epithelial cells, facilitating communication?

Accepted Answer

Gap junctions

Question 19

Which of the following best describes the role of the basement membrane in regulating cell growth?

Accepted Answer

It provides a site for interactions between cell receptors and chemical signals, influencing cell proliferation.

Question 20

Which of the following is TRUE regarding the location of cilia in epithelial tissue?

Accepted Answer

Cilia are located on the apical surface and are present only in certain types of epithelial tissue.

Epithelial Tissue: Structure, Function, and Characteristics

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