Question 1

Which of the following best describes the primary function of tight junctions between epithelial cells?

Accepted Answer

They form a seal that prevents the passage of substances between cells.

Question 2

A patient has a genetic defect that prevents the formation of desmosomes in their epithelial tissue. Which of the following symptoms would most likely result from this defect?

Accepted Answer

Loss of mechanical strength and increased risk of tissue tearing under stress

Question 3

Which of the following statements about epithelial tissue is TRUE?

Accepted Answer

Epithelial tissue has a nerve supply but lacks direct blood supply.

Question 4

A researcher is studying a tissue that lines the alveoli of the lungs and is specialized for rapid diffusion of gases. Which type of epithelial tissue is she most likely observing?

Accepted Answer

Simple squamous epithelium

Question 5

Which of the following best explains why epithelial tissues are able to regenerate rapidly after injury?

Accepted Answer

They are avascular and rely on mitosis of cells near the basement membrane.

Question 6

Which of the following cell junctions is primarily responsible for allowing the passage of ions and small molecules between adjacent cells, facilitating electrical and metabolic communication?

Accepted Answer

Gap junctions

Question 7

A biopsy of a gland reveals that it consists of a single cell that secretes mucus directly onto the epithelial surface. This gland is best classified as:

Accepted Answer

A unicellular exocrine gland

Question 8

Which of the following best describes the relationship between epithelial cells and the basement membrane?

Accepted Answer

Epithelial cells attach to the basement membrane, which anchors them to underlying connective tissue.

Question 9

A tissue sample is observed to have multiple layers of flat cells at the surface, with the deepest layer consisting of cuboidal or columnar cells. This tissue is most likely:

Accepted Answer

Stratified squamous epithelium

Question 10

Which of the following is a key difference between covering and secretory (glandular) epithelia?

Accepted Answer

Covering epithelia form layers that cover surfaces, while secretory epithelia are usually found in clusters specialized for secretion.

Question 11

A patient with a genetic disorder affecting the formation of hemidesmosomes would most likely experience which of the following problems?

Accepted Answer

Inability to anchor epithelial cells to the underlying basement membrane

Question 12

Which of the following best describes the arrangement of cells in pseudostratified epithelium?

Accepted Answer

Cells appear to be in multiple layers, but all cells contact the basement membrane.

Question 13

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

Accepted Answer

Generation of action potentials for communication

Question 14

A tissue sample from the urinary bladder is found to have cells that change shape from cuboidal to squamous when stretched. This tissue is most likely:

Accepted Answer

Transitional epithelium

Question 15

Which of the following best explains why epithelial tissues are more likely to develop cancer compared to other tissue types?

Accepted Answer

Epithelial tissues have a high rate of mitosis, increasing the chance of mutations.

Question 16

Which of the following equations best represents the relationship between surface area ($$A$$), volume ($$V$$), and diffusion rate ($$D) in $$simple squamous epithelium, assuming Fick's law of diffusion?

Accepted Answer

$$D = k 	imes \frac{A}{d}$$

Tissue Level of Organization: Structure and Function in Human Anatomy

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