Abdomen Practice Questions

Q: Which number is pointing to the left iliac region?

12. ***12*** - The **left iliac region** (also called left inguinal region) is located in the **lower left quadrant** of the abdomen, corresponding to number 12 in the standard 9-region anatomical diagram. - This region contains the **left iliac fossa**, **sigmoid colon**, and portions of the **small intestine**, making it a key landmark for abdominal examination. *11* - Number 11 corresponds to the **hypogastric region** (pubic region), which is located in the **lower center** of the abdomen. - This region contains the **bladder**, **uterus** (in females), and **prostate** (in males), not the left iliac structures. *10* - Number 10 represents the **right iliac region** (right inguinal region), positioned in the **lower right** of the abdomen. - This region contains the **cecum**, **appendix**, and **right iliac fossa**, located on the opposite side from the left iliac region. *13* - Number 13 corresponds to a **central or additional labeled region** in the diagram, located **below the standard nine-region grid**. - This region does not correspond to the left iliac region and is not part of the classic three-by-three abdominal partition.

Q: The gastrosplenic ligament is a peritoneal reflection surrounding which artery?

Short gastric artery. **Explanation:** The **gastrosplenic ligament** is a derivative of the dorsal mesogastrium that connects the greater curvature of the stomach to the hilum of the spleen [2]. It forms part of the left lateral border of the lesser sac. It contains the **short gastric arteries** and the **left gastro-omental (gastroepiploic) vessels** [1]. Therefore, Option B is the correct answer. **Analysis of Options:** * **A. Splenic artery:** While the splenic artery is the source of the short gastric vessels, the main trunk of the splenic artery travels retroperitoneally along the superior border of the pancreas and then enters the **lienorenal (splenorenal) ligament**, not the gastrosplenic ligament. * **C. Pancreatic artery:** These are branches of the splenic artery that supply the body and tail of the pancreas, which is a retroperitoneal organ. They do not travel within peritoneal reflections to the stomach. * **D. Common hepatic artery:** This artery arises from the celiac trunk and runs toward the right to enter the hepatoduodenal ligament (part of the lesser omentum). It has no anatomical relationship with the gastrosplenic ligament. **High-Yield Clinical Pearls for NEET-PG:** * **Ligament Contents:** * **Lienorenal ligament:** Contains the splenic artery, splenic vein, and the **tail of the pancreas** (important to avoid injury during splenectomy). * **Gastrosplenic ligament:** Contains short gastric arteries and left gastro-omental vessels [1]. * **Surgical Significance:** During a splenectomy, the gastrosplenic ligament must be divided to mobilize the spleen [2]. Ligation of the short gastric arteries is necessary, but care must be taken not to damage the greater curvature of the stomach [1].

Q: The cardiac orifice of the stomach is located at the level of which vertebra?

T11. The **cardiac orifice** is the junction where the esophagus enters the stomach. In a living individual of average build, this orifice is located at the level of the **T11 vertebra**, approximately 2.5 cm to the left of the midline. [1] ### **Why T11 is Correct** The esophagus pierces the muscular part of the diaphragm at the level of **T10** (the esophageal hiatus). After a short abdominal course of about 1.25 cm, it terminates at the cardiac orifice of the stomach at the level of **T11**. This point is marked internally by the Z-line (squamocolumnar junction). [1] ### **Explanation of Incorrect Options** * **T9:** This level is superior to the diaphragm's major openings. The vena caval opening is slightly higher, at the T8 level. * **T10:** This is the level of the **esophageal hiatus** in the diaphragm. While the esophagus passes through here, the actual orifice (junction with the stomach) is slightly lower. * **L1:** This is the level of the **pyloric orifice** (transpyloric plane). The stomach begins at T11 and ends at L1. ### **High-Yield Clinical Pearls for NEET-PG** * **Diaphragmatic Openings (Mnemonic: Voice Of America):** * **V**ena Cava: **T8** * **O**esophagus: **T10** (along with Vagus nerves) * **A**orta: **T12** (along with Azygos vein and Thoracic duct) * **Surface Anatomy:** The cardiac orifice lies behind the left 7th costal cartilage, 2.5 cm from the sternum. * **Clinical Significance:** The physiological lower esophageal sphincter (LES) at this level prevents gastric acid reflux; dysfunction leads to GERD. [1]

Q: What is the predominant source of blood supply to the organ shown in the histological slide?

Portal vein. ***Portal vein*** - Provides **75-80%** of the liver's blood supply, carrying nutrient-rich blood from the **gastrointestinal tract** and **spleen**. - The **portal tracts** visible in liver histology contain branches of the portal vein, making it the predominant vascular supply. *Hepatic artery* - Supplies only **20-25%** of hepatic blood flow, providing **oxygenated blood** but not the predominant source. - Branches are found in **portal tracts** alongside portal vein branches, but contribute less to total hepatic blood supply. *Hepatic vein* - Functions as the **drainage system** for liver blood, carrying deoxygenated blood from liver to the **inferior vena cava**. - **Central veins** seen in liver lobules drain into hepatic veins, making this an outflow rather than supply vessel. *Cystic artery* - Supplies the **gallbladder**, not the liver parenchyma, and is a branch of the **right hepatic artery**. - Has no role in providing blood supply to **hepatocytes** or liver tissue shown in histological sections.

Q: Which of the following abdominal structures is responsible for sharp pain during abdominal surgery?

Parietal peritoneum. **Explanation:** The sensation of pain in the abdominal cavity is divided into two distinct types based on the nerve supply: **Somatic** and **Visceral**. **1. Why Parietal Peritoneum is Correct:** The parietal peritoneum is the only structure listed that is supplied by **somatic nerves** (the lower intercostal and subcostal nerves). These nerves are sensitive to mechanical stimuli like cutting, pressure, and temperature [1]. When irritated or incised during surgery, the parietal peritoneum produces **sharp, severe, and well-localized pain**, similar to the sensation of a skin incision [1]. **2. Why the other options are incorrect:** * **Liver parenchyma, Small intestine, and Colon:** These are visceral structures supplied by the **autonomic nervous system** (visceral afferent fibers). Visceral organs are insensitive to cutting, burning, or crushing [1]. They only respond to stimuli such as **distension (stretch), ischemia, or smooth muscle spasm** [2]. Pain from these organs is typically described as "dull, aching, or colicky" and is poorly localized (referred pain) [1]. **Clinical Pearls for NEET-PG:** * **Nerve Supply:** Parietal peritoneum is supplied by somatic nerves (T7-L1); Visceral peritoneum is supplied by autonomic nerves (same as the organs it covers) [1]. * **Referred Pain:** Pain from the central part of the diaphragmatic peritoneum is referred to the shoulder (C3-C5) via the phrenic nerve [2]. * **Peritonitis:** When an infection spreads from a viscus to the parietal peritoneum, the pain shifts from "dull/vague" to "sharp/localized" (e.g., the shift of pain from the umbilicus to McBurney’s point in appendicitis) [2].

Q: Which anatomic landmark demarcates upper gastrointestinal bleeding from lower gastrointestinal bleeding?

Ligament of Treitz. The anatomical landmark used to differentiate between Upper Gastrointestinal Bleeding (UGIB) and Lower Gastrointestinal Bleeding (LGIB) is the **Ligament of Treitz** (also known as the suspensory muscle of the duodenum). **1. Why the Correct Answer is Right:** The Ligament of Treitz is a fibromuscular band that extends from the right crus of the diaphragm to the **duodenojejunal (DJ) flexure**. Clinically, any bleeding originating proximal to this landmark (esophagus, stomach, or duodenum) is classified as **UGIB**, while bleeding distal to it (jejunum, ileum, or colon) is classified as **LGIB** [1]. **2. Analysis of Incorrect Options:** * **Ileocecal Valve:** This marks the transition between the small intestine (ileum) and the large intestine (cecum). While it separates the midgut from the hindgut derivatives, it is not the clinical boundary for GI bleeding. * **Papilla of Vater:** Located in the second part of the duodenum, this is where the bile and pancreatic ducts drain. It is an important landmark for ERCP but does not demarcate bleeding zones. * **Pylorus:** This is the sphincter between the stomach and the duodenum. Bleeding from the duodenum (distal to the pylorus) is still considered UGIB. **3. Clinical Pearls for NEET-PG:** * **Presentation:** UGIB typically presents as **hematemesis** (vomiting blood) or **melena** (black, tarry stools) [1]. LGIB usually presents as **hematochezia** (bright red blood per rectum). * **Exception:** Brisk UGIB (massive hemorrhage) can occasionally present as hematochezia due to rapid transit time [1]. * **Anatomy:** The Ligament of Treitz passes **behind the pancreas** and in front of the aorta; it is a key surgical landmark for identifying the DJ flexure during laparotomy.

Q: All of the following are true regarding the anatomical relationships of the kidney and ureter, EXCEPT?

The ureter enters the hilus behind the renal vein.. The correct answer is **C**. This statement is incorrect because of the specific anteroposterior arrangement of structures at the renal hilum. From **anterior to posterior**, the sequence is: **Renal Vein → Renal Artery → Renal Pelvis (Ureter)**. Therefore, the ureter (as the renal pelvis) is the most posterior structure, not simply "behind the vein" (which would imply it is between the vein and artery). In a surgical or anatomical context, the artery lies between the vein and the pelvis. **Analysis of other options:** * **A is true:** Both kidneys rest posteriorly on the diaphragm (superiorly) and the psoas major, quadratus lumborum, and transversus abdominis muscles (medially to laterally) [1]. * **B is true:** The **vertebrocostal trigone (Bochdalek’s gap)** is a thin area of the diaphragm. Due to the relationship with the 12th rib, the pleura (costodiaphragmatic recess) is a close posterior relation to the upper pole, making it vulnerable during renal surgeries. * **D is true:** In females, the ureter travels inferiorly, passing through the uterosacral ligament and then the lateral cervical (cardinal) ligament. Crucially, it passes **under** the uterine artery ("water under the bridge") before entering the bladder. **NEET-PG High-Yield Pearls:** * **Hilar Arrangement:** Remember the mnemonic **V-A-P** (Vein, Artery, Pelvis) from front to back. * **Ureteric Constrictions:** The ureter is narrowest at three points: the pelviureteric junction, the pelvic brim (crossing iliac arteries), and the vesicoureteric junction (narrowest part). * **Surgical Risk:** The proximity of the pleura to the 12th rib means an accidental pleural opening can occur during a posterior approach to the kidney (nephrectomy).

Q: What is the lymphatic drainage of the umbilicus?

To both axillary and inguinal lymph nodes. **Explanation:** The lymphatic drainage of the anterior abdominal wall follows a watershed line known as the **transumbilical plane** (a horizontal line passing through the umbilicus). This plane serves as a critical anatomical boundary for lymphatic flow: 1. **Above the Umbilicus:** Lymphatics drain upwards into the **pectoral group of axillary lymph nodes**. 2. **Below the Umbilicus:** Lymphatics drain downwards into the **superficial inguinal lymph nodes**. Because the umbilicus lies exactly on this watershed line, it possesses a dual drainage system, sending lymph to both the axillary and inguinal nodes. **Analysis of Options:** * **Option A & B:** These are partially correct but incomplete. Drainage is not restricted to just one group; it involves both due to the central location of the umbilicus. * **Option D:** The coeliac lymph nodes drain the foregut derivatives (stomach, upper duodenum, liver, pancreas) [2]. The umbilicus is part of the body wall (somatic structure), not the visceral gut tube. **High-Yield Clinical Pearls for NEET-PG:** * **Sister Mary Joseph’s Nodule:** This refers to a palpable nodule at the umbilicus resulting from the metastasis of an intra-abdominal malignancy (most commonly gastric or ovarian cancer) [2]. It spreads via lymphatics or the falciform ligament. * **Venous Drainage:** Similar to lymphatics, venous blood above the umbilicus drains into the Superior Vena Cava [1] (via axillary/subclavian veins) and below it into the Inferior Vena Cava (via femoral veins). * **Caput Medusae:** In portal hypertension, the paraumbilical veins (portal system) anastomose with the epigastric veins (systemic system) at the umbilicus, leading to dilated, radiating veins.

Question 1

Which number is pointing to the left iliac region?

Accepted Answer

12

Answer

10

Answer

13

Answer

11

Question 2

The gastrosplenic ligament is a peritoneal reflection surrounding which artery?

Accepted Answer

Short gastric artery

Answer

Splenic artery

Answer

Pancreatic artery

Answer

Common hepatic artery

Question 3

Which of the following are the main sources of blood supply to the stomach?

Accepted Answer

Inferior phrenic artery

Answer

Right gastric artery

Answer

Left gastric artery

Answer

Splenic artery

Question 4

The cardiac orifice of the stomach is located at the level of which vertebra?

Accepted Answer

T11

Answer

T9

Answer

T10

Answer

L1

Question 5

What is the predominant source of blood supply to the organ shown in the histological slide?

Accepted Answer

Portal vein

Answer

Hepatic artery

Answer

Hepatic vein

Answer

Cystic artery

Question 6

Which of the following abdominal structures is responsible for sharp pain during abdominal surgery?

Accepted Answer

Parietal peritoneum

Answer

Liver parenchyma

Answer

Small intestine

Answer

Colon

Question 7

Which anatomic landmark demarcates upper gastrointestinal bleeding from lower gastrointestinal bleeding?

Accepted Answer

Ligament of Treitz

Answer

Ileocecal valve

Answer

Papilla of Vater

Answer

Pylorus

Question 8

All of the following are true regarding the anatomical relationships of the kidney and ureter, EXCEPT?

Accepted Answer

The ureter enters the hilus behind the renal vein.

Answer

Posterior relationships include the diaphragm, the psoas major and quadratus lumborum muscles.

Answer

The upper pole of the kidney may be in contact with the pleura in the vertebral costal trigone.

Answer

In the female, the ureter passes through the uterosacral ligament and then the lateral cervical ligament before entering the bladder.

Question 9

What is the lymphatic drainage of the umbilicus?

Accepted Answer

To both axillary and inguinal lymph nodes

Answer

To the axillary lymph nodes

Answer

To the inguinal lymph nodes

Answer

To the coeliac group of lymph nodes

Question 10

A 41-year-old woman with one healthy child presents with a 3-year history of infertility despite normal menstrual cycles and a biphasic basal body temperature chart. She denies sexually transmitted diseases. A hysterosalpingogram shows patent uterine tubes and a normal uterine cavity. Her husband's semen analysis is normal. In the presence of several normal infertility test results, a laparoscopic examination of the pelvic cavity is scheduled. The physician performing the procedure carefully places the trocar lateral to the rectus abdominis muscle and its sheath to avoid injury to a major artery. What artery is being avoided?

Accepted Answer

Inferior epigastric artery

Answer

Superior epigastric artery

Answer

Superficial epigastric artery

Answer

Superficial circumflex iliac artery

Abdomen — MCQs

Abdomen — MCQs

On this page

Practice by Chapter

Want unlimited practice?