Q: Which equation best represents the rate of diffusion ($$R) of $$nutrients to avascular epithelial cells from underlying connective tissue, given a concentration gradient ($$\Delta C) $$and distance ($$d$$)?

$$R = D \times \frac{\Delta C}{d}$$

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

Question 2

Epithelial tissue is classified based on which two main criteria?

Accepted Answer

Number of cell layers and shape of cells

Question 3

Which statement about epithelial tissue is correct?

Accepted Answer

Epithelial tissue is avascular but innervated, receiving nutrients by diffusion from underlying connective tissue.

Question 4

A patient has damage to the basement membrane of their epithelial tissue. Which function is most likely to be compromised?

Accepted Answer

Diffusion of nutrients from underlying connective tissue

Question 5

Which type of epithelial tissue lines the urinary bladder and is specialized to stretch and change shape?

Accepted Answer

Transitional epithelium

Question 6

Which of the following is a distinguishing characteristic of epithelial tissue?

Accepted Answer

Cells are closely packed together with little extracellular material

Question 7

A gland that releases its product directly into the bloodstream without using a duct is classified as:

Accepted Answer

Endocrine gland

Question 8

Which formula correctly represents the relationship between the number of cell layers ($$n) $$and the thickness ($$t) of $$stratified epithelium, assuming each layer has a uniform thickness $$d$$?

Accepted Answer

$$t = n 	imes d$$

Question 9

Which type of epithelial cell is most likely to be found lining the kidney tubules, and what is its primary function?

Accepted Answer

Simple cuboidal epithelium; secretion and absorption

Question 10

A multicellular exocrine gland with a duct and a secretory unit is best described as:

Accepted Answer

Multicellular gland

Question 11

Which of the following best explains why epithelial tissue has a high regenerative capacity?

Accepted Answer

Cells are exposed to friction and hostile substances, requiring frequent replacement through cell division.

Question 12

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

Accepted Answer

Contraction

Question 13

In stratified epithelia, the shape of cells in which layer determines the classification of the tissue?

Accepted Answer

Apical layer

Question 14

Which type of epithelial tissue is most likely to be found in areas subject to abrasion, such as the skin?

Accepted Answer

Stratified squamous epithelium

Question 15

Which of the following best describes the function of cilia on pseudostratified columnar epithelial cells in the upper respiratory tract?

Accepted Answer

Sweep mucus and trapped particles out of the airways

Question 16

Which equation best represents the rate of diffusion ($$R) of $$nutrients to avascular epithelial cells from underlying connective tissue, given a concentration gradient ($$\Delta C) $$and distance ($$d$$)?

Accepted Answer

$$R = D 	imes \frac{\Delta C}{d}$$

Question 17

Which of the following is a correct example of a glandular epithelial tissue and its secretion?

Accepted Answer

Salivary gland; secretes saliva

Question 18

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

Accepted Answer

Simple columnar epithelium

Question 19

A patient presents with a disorder affecting their goblet cells. Which function is most likely to be impaired?

Accepted Answer

Production of mucus

Question 20

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

Accepted Answer

Endocrine glands secrete hormones into the bloodstream, while exocrine glands release their products onto body surfaces or into body cavities.

Epithelial Tissue: Structure, Function, and Classification

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