Question 1

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

Accepted Answer

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

Question 2

A tissue sample is being prepared for light microscopy. Which of the following steps is necessary to allow light to pass through the tissue and reveal cellular details?

Accepted Answer

The tissue must be sectioned into thin slices and stained with colored dyes.

Question 3

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

Accepted Answer

Abundant blood vessels within the tissue.

Question 4

A patient has a genetic defect affecting the basal lamina of their epithelial tissues. Which of the following consequences is most likely?

Accepted Answer

Impaired attachment of epithelial cells to connective tissue, leading to tissue instability.

Question 5

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

Accepted Answer

Its thin, single layer facilitates rapid diffusion of gases.

Question 6

A biopsy of a gland reveals ducts and secretory portions composed of cube-shaped cells arranged in two or more layers. Which type of epithelial tissue is most likely present?

Accepted Answer

Stratified cuboidal epithelium

Question 7

Which of the following statements about pseudostratified columnar epithelium is correct?

Accepted Answer

It contains cells of varying heights, all attached to the basement membrane, and often contains cilia.

Question 8

A researcher is studying a tissue that lines the ducts of sweat glands and is composed of two layers of cube-shaped cells. Which type of epithelial tissue is being observed?

Accepted Answer

Stratified cuboidal epithelium

Question 9

Which of the following best describes the function of goblet cells in the respiratory tract?

Accepted Answer

They secrete mucus to trap dust and lubricate the airway.

Question 10

A tissue sample from the esophagus shows several layers of cells with flattened cells at the surface. Which type of epithelial tissue is this, and what is its primary function?

Accepted Answer

Stratified squamous epithelium; protection against abrasion

Question 11

Which of the following best explains why epithelial tissues are capable of rapid regeneration?

Accepted Answer

They are supported by a basement membrane that provides nutrients via diffusion from underlying connective tissue.

Question 12

A patient presents with a tumor in a gland that releases its secretions directly into the bloodstream. Which type of gland is most likely involved?

Accepted Answer

Endocrine gland

Question 13

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

Accepted Answer

Simple epithelia consist of a single layer of cells, while stratified epithelia have two or more layers.

Question 14

Which of the following equations best represents the relationship between the rate of diffusion ($$J$$), surface area ($$A$$), and concentration gradient ($$\Delta C) $$across a simple squamous epithelium, assuming all other factors are constant?

Accepted Answer

$$J = D 	imes A 	imes \Delta C$$

Question 15

A histological slide shows epithelial cells with microvilli on their apical surface. What is the primary function of these microvilli?

Accepted Answer

To increase surface area for absorption

Question 16

Which of the following scenarios best illustrates the function of transitional epithelium?

Accepted Answer

Stretching to accommodate fluctuating volumes of urine in the bladder

Question 17

A tissue sample from the trachea shows cells of varying heights, all attached to the basement membrane, with cilia on the apical surface. Which type of epithelium is this, and what is its main function?

Accepted Answer

Pseudostratified ciliated columnar epithelium; movement of mucus

Question 18

Which of the following best explains why stratified squamous epithelium is found in areas subject to abrasion, such as the skin and oral cavity?

Accepted Answer

Its multiple layers provide protection against mechanical stress.

Question 19

A patient with cystic fibrosis has thick, sticky mucus in their respiratory tract. Which type of cell is most directly affected, and what is the consequence?

Accepted Answer

Goblet cells; impaired mucus secretion and clearance

Question 20

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

Accepted Answer

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

Anatomy & Physiology Study Notes: Epithelial Tissue and Glands

Guida di studio - Domande di pratica

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