ANAT 100 - Block Theory 3 (2026) Comprehensive Questions and Verified Detailed Solutions (MULTIPLE CHOICES) | COMPLETE SOLUTIONS | A+ GRADED | 100% CORRECT!! Questions for Anatomy Block Theory 3

ANAT 100 - Block Theory 3 (2026) Comprehensive
Questions and Verified Detailed Solutions
(MULTIPLE CHOICES) | COMPLETE SOLUTIONS
| A+ GRADED | 100% CORRECT!! Questions for
Anatomy Block Theory 3

SECTION 1: GASTROINTESTINAL SYSTEM


Question 1
Structural features of the jejunum would include that:
A. It has numerous submucosal glands
B. It has plicae circulares to increase surface area
C. It contains Peyer's patches
D. The mucosa is dominated by goblet cells
Answer: B
Rationale: The jejunum has prominent plicae circulares (circular folds) that
increase surface area for absorption. Submucosal glands are characteristic of the
duodenum, Peyer's patches are found in the ileum, and goblet cell dominance is a
feature of the large intestine.


Question 2
Approximately how long (in cm) is the duodenum?
A. 30
B. 15
C. 20
D. 25
Answer: D

,Rationale: The duodenum is approximately 25 cm (about 10 inches) long. It is the
first and shortest part of the small intestine.


Question 3
Which of the following is a characteristic feature of the ileum?
A. Numerous plicae circulares
B. Peyer's patches in the submucosa
C. Brunner's glands
D. Villi are very tall and numerous
Answer: B
Rationale: Peyer's patches (aggregated lymphoid nodules) are characteristic of the
ileum. Plicae circulares are most prominent in the jejunum, Brunner's glands are in
the duodenum, and villi are most numerous in the jejunum.


Question 4
The majority of nutrient absorption occurs in which part of the small intestine?
A. Duodenum
B. Jejunum
C. Ileum
D. Stomach
Answer: B
Rationale: The jejunum is the primary site of nutrient absorption due to its large
surface area from plicae circulares, villi, and microvilli.


Question 5
Which of the following structures is responsible for increasing the surface area of
the small intestine?
A. Rugae
B. Plicae circulares

,C. Haustra
D. Gastric folds
Answer: B
Rationale: Plicae circulares (circular folds) are permanent folds in the mucosa and
submucosa of the small intestine that significantly increase surface area. Rugae are
in the stomach, and haustra are in the large intestine.


Question 6
Brunner's glands are located in which part of the small intestine?
A. Jejunum
B. Ileum
C. Duodenum
D. Cecum
Answer: C
Rationale: Brunner's glands (submucosal glands) are located in the duodenum and
secrete alkaline mucus to neutralize stomach acid.


Question 7
The vermiform appendix is attached to which structure?
A. Sigmoid colon
B. Jejunum
C. Cecum
D. Duodenum
Answer: C
Rationale: The vermiform appendix is a blind-ended tube attached to the cecum,
the beginning of the large intestine.


Question 8
The large intestine is characterized by all of the following EXCEPT:

, A. Haustra
B. Teniae coli
C. Plicae circulares
D. Omental appendices
Answer: C
Rationale: Plicae circulares are features of the small intestine, not the large
intestine. Haustra, teniae coli, and omental appendices are characteristic of the
large intestine.


Question 9
Which of the following is the correct order of the parts of the small intestine?
A. Ileum, Jejunum, Duodenum
B. Duodenum, Ileum, Jejunum
C. Duodenum, Jejunum, Ileum
D. Jejunum, Duodenum, Ileum
Answer: C
Rationale: The correct order is Duodenum → Jejunum → Ileum. The duodenum is
first and shortest, followed by the jejunum, and then the ileum.


Question 10
Which part of the gastrointestinal tract has the thickest muscularis externa?
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
Answer: B
Rationale: The stomach has the thickest muscularis externa, with three layers
(outer longitudinal, middle circular, and inner oblique) to facilitate churning and
mixing of food.