Question 1

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

Accepted Answer

They prevent substances from passing between adjacent cells by sealing the space between them.

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; found lining alveoli of the lungs.

Question 3

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

Accepted Answer

Keratin provides a waterproof barrier and protects against mechanical stress.

Question 4

Which equation correctly represents the relationship between the number of cell layers ($$n) $$and the rate of diffusion ($$D) $$across an epithelial membrane, assuming all other factors are constant?

Accepted Answer

$$D = \frac{k}{n}$$

Question 5

A patient has a genetic defect resulting in nonfunctional desmosomes. Which symptom would most likely be observed?

Accepted Answer

Fragile skin that blisters easily due to poor mechanical adhesion between cells.

Question 6

Which connective tissue cell type is primarily responsible for producing collagen fibers in the extracellular matrix?

Accepted Answer

Fibroblasts

Question 7

Which type of cartilage is most abundant in the human body and provides a glassy, bluish appearance to structures such as the trachea and articular surfaces of bones?

Accepted Answer

Hyaline cartilage

Question 8

Which of the following best describes the function of gap junctions in tissues?

Accepted Answer

They allow direct communication between adjacent cells by permitting the passage of ions and small molecules.

Question 9

Which type of connective tissue is found in tendons and ligaments, and what is its primary structural feature?

Accepted Answer

Dense regular connective tissue; parallel bundles of collagen fibers.

Question 10

Which of the following is a function of adipocytes in connective tissue?

Accepted Answer

Storage of triglycerides for energy reserve.

Question 11

Which type of epithelial tissue lines the urinary bladder and allows it to stretch as it fills?

Accepted Answer

Transitional epithelium

Question 12

Which of the following best describes merocrine secretion in exocrine glands?

Accepted Answer

Products are released by exocytosis without damage to the cell.

Question 13

Which connective tissue type is most abundant beneath the skin and acts as a packing material around organs?

Accepted Answer

Loose (areolar) connective tissue

Question 14

Which equation best represents the calculation of total surface area ($$A) of a $$simple cuboidal epithelial cell with side length $$l$$?

Accepted Answer

$$A = 6 	imes l^2$

Question 15

Which of the following is a function of mast cells in connective tissue?

Accepted Answer

They release histamine and other mediators during inflammation.

Question 16

Which type of epithelial tissue is found lining the small intestine and is specialized for absorption due to the presence of microvilli?

Accepted Answer

Simple columnar epithelium

Question 17

Which specialized connective tissue contains chondrocytes in lacunae and a matrix rich in collagen fibers, making it resistant to compression and found in intervertebral discs?

Accepted Answer

Fibrocartilage

Question 18

Which of the following best describes the function of the basal surface of epithelial tissue?

Accepted Answer

It attaches the epithelial cells to the underlying connective tissue via the basement membrane.

Question 19

Which type of secretion involves the release of products by rupture and death of the entire cell?

Accepted Answer

Holocrine secretion

Question 20

Which of the following is a function of connective tissue proper?

Accepted Answer

Binding and supporting organs and tissues.

Introduction to Tissues: Structure, Function, and Classification

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