Deck I Flashcards Preview

USMLE World Missed Questions > Deck I > Flashcards

Flashcards in Deck I Deck (30):
1

Where do gastric ulcers most commonly arise?

Lesser curvature of stomach at the border between the acid secreting and gastrin secreting mucosa

2

What artery supplies the proximal lesser curvature of the stomach?

Left Gastric

3

What artery supplies the distal lesser curvature of the stomach?

Right Gastric

4

What retroperitoneal structure is most likely to be damaged in blunt abdominal trauma causing a mild hematoma?

Pancreas

5

What intestinal segment is always involved in Hirschsprung disease and why?

Rectum because neural crest cells migrate caudally

6

What vessel has the highest oxygen content in a fetus?

Umbillical vein

7

Describe the flow of blood from the umbillican vein to the heart in a fetus.

Through the ductus venosus of the liver (to bypass hepatic circulation) and it then enters the IVC to be delivered to the heart

8

What structures of the kidney are derived from the ureteric bud?

Collecting system of the kidney- collecting tubules and ducts, major and minor calyses, renal pelvis, and the ureters

9

What structures of the kidney are derived from the metanephric blastema?

Glomeruli, Bowman's space, proximal tubules, the loop of Henle, distal convuluted tubules.

10

What layers comprise the lesser omentum?

Hepatoduodenal ligament and hepatogastric ligament

11

What chamber comprises the majority of the heart's posterior surface?

Left atrium

12

What chamber of the heart lies in closest proximity to the esophagus?

Left atrium

13

At what location is an injection most likely to injure the superior gluteal nerve?

The superiormedial quadrant of the buttock

14

What clinical sign is consistent with an injury to the superior gluteal nerve?

Trendelenburg gait (gluteus medius gait)

15

Which cardiac chamber composes most of the heart's anterior surface?

Right ventricle

16

Which artery is the major blood supply to the upper ureter?

Renal artery

17

What vessels supply the distal ureter?

Branches from the aorta and illiac, gonadal and vesical arteries.

18

From what site is the saphenous vein best harvested?

Just inferolateral to the pubic tubercle

19

What is the role of MIF in male genitalia development?

Regression of the paramesonephric (mullerian) ducts that normally give rise to the internal genitalia of the female fetus.

20

What is the role of testosterone in male genitalia development?

Mediates development of male internal genitalia.

21

What is the role of DHT in male genitalia development?

Mediates development of male external genitalia.

22

What nerve is at risk for ligation in thyroidectomy?

External branch of the superior laryngeal nerve

23

What muscle is innervated by the external branch of the superior laryngeal nerve?

Cricothyroid muscle

24

What nerve is in close proximity to the superior thyroid artery and vein?

External branch of the superior laryngeal nerve

25

What is the origin of melanocytes?

Neural crest cells

26

What structure is most likely to be damaged due to a fractured 12th rib on the left side?

Left kidney

27

Injury to which ribs is most likely to cause a laceration of the spleen?

9th, 10th, 11th, on the left side.

28

A pelvic fracture and inability to void despite full bladder is indicitive of damage to which male urogenital structure?

Posterior urethra

29

What structure is most likely to be damaged in straddle injuries in males?

Anterior urethra

30

Why is phospholipid content of amniotic fluid checked in amniocentesis?

As a measure of lung maturity.