$$\text{Mucin (glycoprotein)} + \text{H}_2\text{O} \rightarrow \text{Mucus}$$

Question 1

Which of the following best describes the main function of goblet cells in the epithelial lining of the respiratory and intestinal tracts?

Accepted Answer

They produce mucin, which forms mucus to protect and lubricate surfaces.

Question 2

A gland that releases its product by exocytosis without damaging the secreting cell is classified as which type of gland?

Accepted Answer

Merocrine

Question 3

Which of the following is a distinguishing feature of holocrine secretion?

Accepted Answer

Products are secreted by rupture of gland cells.

Question 4

Which of the following equations best represents the process of mucin production and secretion by goblet cells?

Accepted Answer

$$	ext{Mucin (glycoprotein)} + 	ext{H}_2	ext{O} ightarrow 	ext{Mucus}$$

Question 5

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

Accepted Answer

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

Question 6

A patient presents with dry, irritated respiratory passages. Which cell type is most likely malfunctioning?

Accepted Answer

Goblet cell

Question 7

Which of the following is NOT a characteristic of multicellular exocrine glands?

Accepted Answer

They always secrete hormones into the bloodstream.

Question 8

Which of the following best explains why holocrine glands require frequent cell division?

Accepted Answer

Because their products are secreted by rupture of gland cells, requiring replacement of lost cells.

Question 9

Which of the following is an example of a merocrine gland?

Accepted Answer

Sweat gland

Question 10

A researcher is studying a gland that consists of a single cell embedded within columnar epithelium. Which gland is being studied?

Accepted Answer

Goblet cell

Question 11

Which of the following best describes the role of the Golgi apparatus in goblet cells?

Accepted Answer

It packages mucin into secretory vesicles for exocytosis.

Question 12

Which of the following scenarios best illustrates the function of mucus produced by goblet cells?

Accepted Answer

Mucus traps dust and microbes in the respiratory tract, preventing them from reaching the lungs.

Question 13

Which of the following statements about glandular epithelia is correct?

Accepted Answer

Glands are classified by site of product release and number of cells.

Question 14

Which of the following best describes the process of exocytosis in merocrine glands?

Accepted Answer

Secretory vesicles fuse with the plasma membrane to release their contents.

Question 15

Which of the following is a correct pairing of gland type and example?

Accepted Answer

Merocrine – salivary gland

Question 16

A mutation prevents the formation of secretory vesicles in goblet cells. Which cellular process would be directly affected?

Accepted Answer

Exocytosis of mucin

Question 17

Which of the following best explains why mucus is important in the intestinal tract?

Accepted Answer

It protects and lubricates the lining, facilitating the passage of food.

Question 18

Which of the following best describes the relationship between the rough endoplasmic reticulum (ER) and mucin production in goblet cells?

Accepted Answer

The rough ER synthesizes proteins that are modified into mucin.

Question 19

Which of the following is a real-life consequence of defective holocrine gland function?

Accepted Answer

Dry, flaky skin due to reduced sebum production.

Question 20

Which of the following best describes the role of microvilli in goblet cells?

Accepted Answer

They increase the surface area for secretion.

Glandular Epithelia: Structure, Function, and Classification

Study Guide - Practice Questions