Question 1

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

Accepted Answer

They prevent the passage of substances between adjacent cells, maintaining cell polarity.

Question 2

A tissue sample from the lining of the urinary bladder shows cells that change shape when stretched. Which type of epithelial tissue is this?

Accepted Answer

Transitional epithelium

Question 3

Which of the following cell junctions is primarily responsible for allowing electrical signals to pass rapidly between cardiac muscle cells?

Accepted Answer

Gap junctions

Question 4

Which connective tissue fiber type provides the greatest tensile strength to tissues such as tendons?

Accepted Answer

Collagen fibers

Question 5

A gland that releases its secretions directly into the bloodstream without the use of ducts is classified as:

Accepted Answer

Endocrine gland

Question 6

Which of the following best describes the main function of stratified squamous epithelium in the skin?

Accepted Answer

Protection against abrasion and pathogens

Question 7

Which of the following is a characteristic of cardiac muscle tissue but NOT skeletal muscle tissue?

Accepted Answer

Intercalated discs containing gap junctions and desmosomes

Question 8

Which of the following best explains why cartilage heals more slowly than bone?

Accepted Answer

Cartilage lacks a direct blood supply, while bone is highly vascularized.

Question 9

Which of the following is a function of neuroglia in nervous tissue?

Accepted Answer

Supporting, insulating, and protecting neurons

Question 10

A patient presents with a genetic defect in cadherin proteins. Which cell junction would most likely be affected, and what is a possible consequence?

Accepted Answer

Desmosomes; increased risk of tissue tearing under stress

Question 11

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

Accepted Answer

Simple epithelia consist of a single cell layer; stratified epithelia have two or more layers.

Question 12

Which of the following connective tissue cells is responsible for producing the extracellular matrix in cartilage?

Accepted Answer

Chondroblast

Question 13

Which of the following best explains why simple squamous epithelium is found in the alveoli of the lungs?

Accepted Answer

It allows for rapid diffusion of gases due to its thin, flat structure.

Question 14

Which of the following is a key difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones into the bloodstream; exocrine glands secrete products onto body surfaces or into cavities.

Question 15

A biopsy reveals tissue with long, cylindrical, multinucleated, striated fibers under voluntary control. Which tissue is this?

Accepted Answer

Skeletal muscle

Question 16

Which of the following best describes the role of mast cells in connective tissue?

Accepted Answer

They initiate local inflammatory responses against foreign microorganisms.

Question 17

Which of the following is a real-life example of the importance of gap junctions in human physiology?

Accepted Answer

They allow coordinated contraction of cardiac muscle cells, enabling the heart to beat efficiently.

Question 18

Which of the following best explains why stratified cuboidal epithelium is rare in the human body?

Accepted Answer

Its main function is limited to protection in ducts of sweat and mammary glands.

Question 19

Which of the following best describes the function of the basement membrane in epithelial tissues?

Accepted Answer

It anchors epithelial tissue to underlying connective tissue and regulates exchange of materials.

Question 20

A patient with a burn injury has lost the protective barrier of the skin. Which tissue type is primarily damaged, and what is a major consequence?

Accepted Answer

Epithelial tissue; increased risk of infection and dehydration

The Tissue Level of Organization: Structure, Function, and Classification

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