1.
Which of the following is not true of the Ileum?
Correct Answer
E. Fewer Arcades than the Jejunum
Explanation
The Ileum is a part of the small intestine located between the jejunum and the large intestine. It is smaller in diameter than the jejunum, which means it has a narrower lumen. The walls of the ileum are thinner than the jejunum, making it more flexible. The ileum has a greater amount of fatty mesentery compared to the jejunum, which helps to support and protect it. However, the ileum has shorter vaso rectae, which are straight arteries that supply blood to the intestine, compared to the jejunum. Lastly, the ileum has fewer arcades, which are the series of arches formed by the branches of the superior mesenteric artery, compared to the jejunum.
2.
Which of the following nerves when innervated would stimulate vasoconstriction and reduce peristalsis and secretion in the Ileum?
Correct Answer
B. Thoracic Splanchnics
Explanation
Since this is a sympathetic response, the answer would have to be Thoracic Splanchnics T8-T10. Lumbar Splanchnics also give a sympathetic response, but to the kidney, bladder, sexual organs and the last part of the colon.
3.
A patient presents to you with pain in the lower right quadrant. Scans show a remnant of the yolk stalk extending from the Ileum as a blind-ended sac. Which of the following does the patient have?
Correct Answer
A. Meckel's Diverticulum
Explanation
Meckel’s Diverticulum • 2-4% of the population – more common in males • Remnant of the Vitelline duct (yolk stalk that normally disintegrates) extending from ileum as a blind-ended sac • May be connected to umbilicus • Material can become trapped, creating infection & pain that is easily confused w/ appendicitis
4.
Which of the following is not true of the Appendix?
Correct Answer
C. Contains substance possibly used for immune function except bacteria
Explanation
It does contain bacteria.
5.
Where Where would you find McBurney's Point on a patient?
Correct Answer
A. 1/3 of the way from ASIS to the Umbilicus
Explanation
McBurney's Point is a reference point to help find Appendicitis.
6.
The main funciton of the colon is to:
Correct Answer
A. Absorb water and electrolytes from indigestible portion of the chyme
Explanation
The colon is responsible for absorbing water and electrolytes from the indigestible portion of the chyme. This is an important function as it helps in maintaining proper hydration levels in the body and also ensures that essential electrolytes are retained.
7.
While on rotations, you encounter a patient with an aneurysm in the Inferior Mesenteric Artery. The attending physician asks you how the blood will still be able to reach the Sigmoid Colon. You respond by way of the_________________.
Correct Answer
A. Marginal Artery of Drummond
Explanation
Marginal a of Drummond
 Anastomoses the SMA & IMA
8.
Termination of Teniae Coli indicates what?
Correct Answer
D. Junction between sigmoid colon and rectum
Explanation
The termination of Teniae Coli refers to the junction between the sigmoid colon and rectum. The Teniae Coli are three bands of longitudinal smooth muscle that run along the length of the large intestine. They start at the base of the appendix and converge at the sigmoid colon. The termination point of the Teniae Coli is important anatomically as it marks the transition from the sigmoid colon to the rectum.
9.
Which portion of the rectum is retroperitoneal?
Correct Answer
B. Middle
Explanation
o Superior portion - intraperitoneal o Middle portion - retroperitoneal o Inferior portion - subperitoneal
10.
If there is a lesion in the lumbar splanchnics, you would expect which of the following?
Correct Answer
B. Internal Anal SpHincter does not contract
Explanation
The Internal Anal Sphincter is controlled by the ANS, where the internal anal sphincter is contracted by sympathetic innervation and inhibited by parasympathetic innervation. Since the Lumber Splanchnics control the sympathetic innervation of the anus, we would expect problems with contraction if there is a lesion. The external anal sphincter is voluntary skeletal muscle innervated by the inferior rectal nerve which is a branch of the pudendal nerve.
11.
A patient presents to you a few weeks after delivering a baby. She complains of pain near the anus. After an examination, you find vericose veins near the pectinate line. Which one of the following conditions does the patient have?
Correct Answer
D. Hemarrhoids
Explanation
The patient's complaint of pain near the anus along with the presence of varicose veins near the pectinate line suggests that the patient has hemorrhoids. Hemorrhoids are swollen blood vessels located in the rectum or anus, which can cause pain, itching, and discomfort. The presence of these varicose veins is a characteristic feature of hemorrhoids, making it the correct answer in this case. Meckel's Diverticulum, Megacolon, and Polyps are unrelated conditions and do not present with the same symptoms described by the patient.
12.
A colonoscopy reveals that a patient has polyps in the colon. You are afraid that the cancer could potentially spread to the liver. By which vessel does the cancer typically spread to the liver from the colon?
Correct Answer
A. Hepatic Portal Vein
Explanation
The infection will spread via portal circulation.
13.
A patient presents to you with symptoms of long duration of constipation, abdominal bloating and pain. Scans reveal that the colon is dilated and that the feces have consildated into hard masses. You suspect that peristalsis has ceased. Which of the following does the patient most likely have?
Correct Answer
A. Megacolon
Explanation
Megacolon • Abnormal dilation of colon • Peristalsis ceases • Extreme cases – may require surgical removal • Symptoms: constipation, abnormal bloating and/or pain • Treatment: laxatives, dietary changes, anti-inflammatory medication if toxic, surgery (all or part)