Q: Which equation best represents the rate of diffusion ($$R) $$across a simple squamous epithelium, given permeability constant $$k$$, surface area $$A$$, and concentration difference $$\Delta C$$?

$$R = k \times A \times \Delta C$$

Question 1

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

Accepted Answer

Cells are loosely arranged with large extracellular spaces.

Question 2

A patient suffers a severe sunburn, and the damaged skin peels off in sheets rather than as individual cells. Which cell junction is primarily responsible for this phenomenon?

Accepted Answer

Desmosomes

Question 3

Which type of epithelial tissue is best suited for rapid diffusion and is found lining the air sacs of the lungs?

Accepted Answer

Simple squamous epithelium

Question 4

Which formula correctly represents the relationship between the surface area ($$A) $$and the number of microvilli ($$n) on an $$epithelial cell, if each microvillus has an average area $$a$$?

Accepted Answer

$$A = n 	imes a$$

Question 5

Which type of gland releases its secretions directly into the blood or interstitial fluid, rather than through a duct?

Accepted Answer

Endocrine gland

Question 6

A tissue sample from the urinary bladder shows cells that appear cuboidal when the bladder is empty and flattened when full. What type of epithelium is this?

Accepted Answer

Transitional epithelium

Question 7

Which of the following best describes the function of cilia on epithelial cells lining the respiratory tract?

Accepted Answer

Moving mucus along the surface toward the throat

Question 8

Which mode of exocrine secretion involves the entire cell bursting to release its contents, as seen in sebaceous glands?

Accepted Answer

Holocrine secretion

Question 9

If a gland releases its product by exocytosis without losing any cytoplasm, which mode of secretion is this?

Accepted Answer

Merocrine secretion

Question 10

Which of the following is a function of epithelial tissue that is critical for maintaining homeostasis in the body?

Accepted Answer

Controlling permeability of substances entering or leaving the body

Question 11

A biopsy reveals a single layer of rectangular cells with nuclei near the base, lining the small intestine. What type of epithelium is this?

Accepted Answer

Simple columnar epithelium

Question 12

Which equation best represents the rate of diffusion ($$R) $$across a simple squamous epithelium, given permeability constant $$k$$, surface area $$A$$, and concentration difference $$\Delta C$$?

Accepted Answer

$$R = k 	imes A 	imes \Delta C$$

Question 13

Which type of epithelial tissue is most likely to be found lining the ducts of sweat glands and mammary glands?

Accepted Answer

Stratified cuboidal epithelium

Question 14

Which of the following cell junctions prevents the diffusion of fluids and solutes between adjacent epithelial cells?

Accepted Answer

Tight junctions

Question 15

Which type of epithelial cell is hexagonal in top view and has a large, round nucleus in the center?

Accepted Answer

Cuboidal cell

Question 16

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

Accepted Answer

Producing movement by contraction

Question 17

A tissue sample from the trachea shows cells with cilia and nuclei at different heights, but all cells touch the basement membrane. What type of epithelium is this?

Accepted Answer

Pseudostratified columnar epithelium

Question 18

Which of the following best explains why simple squamous epithelium is not found on the surface of the skin?

Accepted Answer

It is too fragile to withstand mechanical stress.

Question 19

Which type of exocrine gland secretion involves the loss of both product and some cytoplasm, as seen in mammary glands?

Accepted Answer

Apocrine secretion

The Tissue Level of Organization: Essentials of Anatomy & Physiology Chapter 4 Study Notes

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