Q: Which equation correctly represents the relationship between the number of cell layers ($$n) $$and the classification of epithelial tissue?

$$n = 1$$ \rightarrow \text{Simple epithelium}$

Question 1

Which of the following best describes the function of tight junctions in epithelial tissue?

Accepted Answer

They hold cells closely together so that the space between is impermeable to the movement of macromolecules.

Question 2

Which type of epithelial tissue is best adapted for rapid diffusion of substances such as oxygen and carbon dioxide, and where is it commonly found?

Accepted Answer

Simple squamous epithelium; air sacs of the lungs

Question 3

Which of the following is a function of the extracellular matrix (ECM) in connective tissue?

Accepted Answer

It regulates the development, mitotic activity, and survival of cells in a tissue.

Question 4

A patient has a genetic defect affecting the production of collagen fibers. Which of the following symptoms would most likely result from this defect?

Accepted Answer

Decreased resistance to tension and pressure in connective tissues

Question 5

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

Accepted Answer

$$n = 1$$ ightarrow 	ext{Simple epithelium}$

Question 6

Which of the following best explains the benefit of microvilli on the apical surface of simple columnar epithelial cells?

Accepted Answer

Microvilli increase the surface area for absorption of substances.

Question 7

Keratinized stratified squamous epithelium is found in the outer layer of skin. What is the primary function of keratin in these cells?

Accepted Answer

Keratin provides resistance to friction and makes the epithelium tough and waterproof.

Question 8

Which type of gland releases its product by accumulating the secretion until the cell ruptures and dies?

Accepted Answer

Holocrine gland

Question 9

A tissue sample from the urinary bladder shows cells that change shape from dome-shaped to flattened when stretched. What type of epithelium is this?

Accepted Answer

Transitional epithelium

Question 10

Which of the following connective tissue fibers is most responsible for providing elasticity to tissues such as skin and blood vessels?

Accepted Answer

Elastic fibers

Question 11

Gap junctions are important in cardiac muscle cells because they:

Accepted Answer

Allow ions and small molecules to flow freely between adjacent cells, enabling electrical communication.

Question 12

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

Accepted Answer

Generation of contractile force for movement

Question 13

Which type of connective tissue is classified as a fluid connective tissue and is the main transport medium in the body?

Accepted Answer

Blood

Question 14

Which of the following best describes the role of fibroblasts in connective tissue?

Accepted Answer

Fibroblasts make protein fibers, ground substance, and components of the ECM.

Question 15

Which equation represents the function of the ECM in providing tensile strength to tissues?

Accepted Answer

$$	ext{Tensile Strength} \propto 	ext{Collagen Fiber Content}$$

Question 16

A biopsy reveals epithelial cells with cilia and nuclei at varying heights, but all cells are attached to the basement membrane. What type of epithelium is this?

Accepted Answer

Pseudostratified columnar epithelium

Question 17

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

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream; exocrine glands release products onto epithelial surfaces.

Question 18

Which of the following is a correct pairing of epithelial tissue type and its location?

Accepted Answer

Simple cuboidal epithelium; kidney tubules

Question 19

Which of the following best explains why epithelial tissues are avascular?

Accepted Answer

Epithelial tissues rely on nutrients by diffusion from deeper tissues.

Introduction to Tissues: Structure, Function, and Classification

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