Question

question 19
which of the following structures is anatomically the longest?
esophagus
duodenum
jejunum
ileum
question 20
a barium enema study is used to detect and locate:
polyps.
tumors.
diverticula.
all of the above.
question 21
bile is secreted by:
parietal cells.
crypts of lieberkühn.
kupffer cells.
hepatic cells.

Explanation:

Question 19

To determine the longest anatomical structure among the options (Esophagus, Duodenum, Jejunum, Ileum), we recall the lengths of these digestive tract parts. The esophagus is relatively short (about 25 cm). The duodenum is the first part of the small intestine (about 25 - 38 cm). The jejunum is next (about 1 - 2 meters), and the ileum is the longest part of the small intestine (about 2 - 4 meters). So the ileum is the longest.

A barium enema study involves using barium sulfate to visualize the large intestine (colon) on X - rays. Polyps, tumors, and diverticula are all abnormalities that can be detected in the colon using this method. So a barium enema can detect and locate polyps, tumors, and diverticula, meaning "all of the above" is correct.

Parietal cells secrete hydrochloric acid and intrinsic factor (in the stomach). Crypts of Lieberkühn are in the small intestine and secrete intestinal juice. Kupffer cells are macrophages in the liver (involved in phagocytosis). Hepatic cells (hepatocytes) are the main cells of the liver and are responsible for secreting bile.

Answer:

D. Ileum

Question 20