Amazon
Avaya
Cisco
CompTIA
CrowdStrike
EC-Council
EXIN
Fortinet
Google
ISC
ISC2
ITIL
Juniper
Microsoft
NVIDIA
Okta
Palo Alto Networks
Salesforce
All Vendors
  1. Home
  2. USMLE
  3. STEP1

USMLE STEP1 Exam (page: 17)
USMLE Step1
Updated on: 15-Feb-2026

Viewing Page 17 of 171
STEP1 PDF 845 Questions

A female patient is diagnosed by sonogram with uterus didelphys (double uterus). The imaging study reveals a bicornuate uterus with a single vagina. During development, the uterus develops from which of the following?

  1. mesonephric ducts
  2. nephrogenic ridge
  3. paramesonephric ducts
  4. urogenital sinus
  5. yolk sac

Answer(s): C

Explanation:

During development, the uterus develops from fusion of the caudal ends of the para-mesonephric ducts.
Failure of fusion results in uterus didelphys. The mesonephric ducts (choice A) give rise to the epididymis, vas deferens, and ejaculatory duct in the male. The nephrogenic ridge (choice B) is the derivative of the urogenital ridge which will give rise to the urinary system. The urogenital sinus (choice D) gives rise to the urinary bladder, urethra, vagina, and associated glands in the female. The yolk sac (choice E) plays a role in transfer of nutrients before uteroplacental circulation is established, in blood development before the liver begins its hemopoietic activity, and is the site of formation of primordial germ cells.



Anewborn infant suffers from a posterolateral defect on the left side of the body. His abdominal contents have herniated through the defect into the thoracic cavity, and as a result, the infant suffers from pulmonary hypoplasia. His breathing difficulty is life threatening because the herniation has inhibited lung development and inflation. This congenital defect is due to a malformation of which of the following?

  1. mesentery of the esophagus
  2. muscular ingrowth of the body wall
  3. pleuropericardial membrane
  4. pleuroperitoneal membrane
  5. septum transversum

Answer(s): D

Explanation:

congenital defect of the pleuroperitoneal membrane results in an abnormal opening in the posterolateral aspects of the diaphragm. This defect occurs more often on the left side of the body. It is due to the failure of the pleuroperitoneal membrane to form properly and/or to fuse with the other parts of the diaphragm: the mesentery of the esophagus (choice A), the muscular ingrowth of the body wall (choice B), and the septum transversum (choice E). The pleuropericardial membranes (choice C) participate in the formation of the mediastinum and do not contribute to the formation of the diaphragm.



A 17-year-old male college student is brought to the emergency room, displaying vomiting, fever, and diarrhea. The patient reports that for a period of 24 hours prior to admission, he suffered from abdominal pain first centered around the navel and then moving inferiorly to the right. As the patient talks, you realize that he is gesturing toward McBurney's point. You tentatively diagnose acute appendicits and request emergency surgery. Accurate visual identification of the appendix during surgery can be verified by using which of the following landmarks?

  1. bifurcation of the abdominal aorta
  2. epiploic appendages
  3. haustra
  4. inferior border of the right kidney
  5. taeniae coli

Answer(s): E

Explanation:

The position of the appendix varies depending on the patient. The taeniae coli are three longitudinal bands of smooth muscle running the length of the colon. Since the appendix is part of the colon, the taeniae coli can be accurately followed to this structure. The bifurcation of the abdominal aorta (choiceA) and inferior border of the right kidney (choice D) are retroperitoneal and would not be of value in identification of the appendix. The epiploic appendages (choice B) are small pockets of fatty tissue along the length of the colon, but they are not found on the appendix. The haustra (choice C) are sacculations of the large intestine resulting from contractions of the taeniae coli.



The efferent limb of the pupillary light reflex is interrupted along with corticospinal and orticobulbar fibers in which of the following clinical entities?

  1. Broca's aphasia
  2. inferior alternating hemiplegia
  3. middle alternating hemiplegia
  4. superior alternating hemiplegia
  5. Wallenberg syndrome

Answer(s): D

Explanation:

Compression of cranial nerve III, in combination with descending corticospinal and corticobulbar fibers, occurs as part of superior alternating hemiplegia. Patients with Broca's aphasia (choice A) typically do not exhibit involvement of the pupillary light reflexes. Inferior alternating hemiplegia (choice B) and middle alternating hemiplegia (choice C) involve cranial nerves XII and VI, respectively, in combination with corticospinal fibers. Wallenberg syndrome (lateral medullary syndrome) (choice E) typically does not include damage to the corticospinal tract.



Horner syndrome is sometimes seen in patients diagnosed with the lateral medullary syndrome. Which of the following is a characteristic feature of Horner syndrome?

  1. atrophy of tongue musculature
  2. mydriasis
  3. paralysis of muscles of facial expression
  4. profuse sweating
  5. red blushing of the skin in the affected area

Answer(s): E

Explanation:

The skin in the affected area is red and dry (not moist as in choice D) due to diminished sympathetic activity. The pupil on the affected side is constricted (myosis) (not dilated as in choice B) due to unopposed activity of the sphincter pupillae muscle. Motor deficits such as atrophy of tongue musculature (choice A) or paralysis of facial expression muscles (choice C) are typically not part of Horner syndrome.



Viewing Page 17 of 171



Share your comments for USMLE STEP1 exam with other users:

DMZ 6/25/2023 11:56:00 PM

this exam dumps just did the job. i donot want to ruffle your feathers but your exam dumps and mock test engine is amazing.
UNITED KINGDOM


Jose 8/30/2023 6:14:00 AM

nice questions
PORTUGAL


Tar01 7/24/2023 7:07:00 PM

the explanation are really helpful
Anonymous


DaveG 12/15/2023 4:50:00 PM

just passed my exam yesterday on my first attempt. these dumps were extremely helpful in passing first time. the questions were very, very similar to these questions!
Anonymous


A.K. 6/30/2023 6:34:00 AM

cosmos db is paas not saas
Anonymous


S Roychowdhury 6/26/2023 5:27:00 PM

what is the percentage of common questions in gcp exam compared to 197 dump questions? are they 100% matching with real gcp exam?
Anonymous


Bella 7/22/2023 2:05:00 AM

not able to see questions
Anonymous


Scott 9/8/2023 7:19:00 AM

by far one of the best sites for free questions. i have pass 2 exams with the help of this website.
CANADA


donald 8/19/2023 11:05:00 AM

excellent question bank.
Anonymous


Ashwini 8/22/2023 5:13:00 AM

it really helped
Anonymous


sk 5/13/2023 2:07:00 AM

excelent material
INDIA


Christopher 9/5/2022 10:54:00 PM

the new versoin of this exam which i downloaded has all the latest questions from the exam. i only saw 3 new questions in the exam which was not in this dump.
CANADA


Sam 9/7/2023 6:51:00 AM

question 8 - can cloudtrail be used for storing jobs? based on aws - aws cloudtrail is used for governance, compliance and investigating api usage across all of our aws accounts. every action that is taken by a user or script is an api call so this is logged to [aws] cloudtrail. something seems incorrect here.
UNITED STATES


Tanvi Rajput 8/14/2023 10:55:00 AM

question 13 tda - c01 answer : quick table calculation -> percentage of total , compute using table down
UNITED KINGDOM


PMSAGAR 9/19/2023 2:48:00 AM

pls share teh dump
UNITED STATES


zazza 6/16/2023 10:47:00 AM

question 44 answer is user risk
ITALY


Prasana 6/23/2023 1:59:00 AM

please post the questions for preparation
Anonymous


test user 9/24/2023 3:15:00 AM

thanks for the questions
AUSTRALIA


Draco 7/19/2023 5:34:00 AM

please reopen it now ..its really urgent
UNITED STATES


Megan 4/14/2023 5:08:00 PM

these practice exam questions were exactly what i needed. the variety of questions and the realistic exam-like environment they created helped me assess my strengths and weaknesses. i felt more confident and well-prepared on exam day, and i owe it to this exam dumps!
UNITED KINGDOM


abdo casa 8/9/2023 6:10:00 PM

thank u it very instructuf
Anonymous


Danny 1/15/2024 9:10:00 AM

its helpful?
INDIA


hanaa 10/3/2023 6:57:00 PM

is this dump still valid???
Anonymous


Georgio 1/19/2024 8:15:00 AM

question 205 answer is b
Anonymous


Matthew Dievendorf 5/30/2023 9:37:00 PM

question 39, should be answer b, directions stated is being sudneted from /21 to a /23. a /23 has 512 ips so 510 hosts. and can make 4 subnets out of the /21
Anonymous


Adhithya 8/11/2022 12:27:00 AM

beautiful test engine software and very helpful. questions are same as in the real exam. i passed my paper.
UNITED ARAB EMIRATES


SuckerPumch88 4/25/2022 10:24:00 AM

the questions are exactly the same in real exam. just make sure not to answer all them correct or else they suspect you are cheating.
UNITED STATES


soheib 7/24/2023 7:05:00 PM

question: 78 the right answer i think is d not a
Anonymous


srija 8/14/2023 8:53:00 AM

very helpful
EUROPEAN UNION


Thembelani 5/30/2023 2:17:00 AM

i am writing this exam tomorrow and have dumps
Anonymous


Anita 10/1/2023 4:11:00 PM

can i have the icdl excel exam
Anonymous


Ben 9/9/2023 7:35:00 AM

please upload it
Anonymous


anonymous 9/20/2023 11:27:00 PM

hye when will post again the past year question for this h13-311_v3 part since i have to for my test tommorow…thank you very much
Anonymous


Randall 9/28/2023 8:25:00 PM

on question 22, option b-once per session is also valid.
Anonymous