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

USMLE STEP1 Exam (page: 11)
USMLE Step1
Updated on: 25-Dec-2025

Viewing Page 11 of 171
STEP1 PDF 845 Questions

In the central auditory pathways, second-order neurons are located in which of the following?

  1. cochlear (spiral) ganglion
  2. cochlear nuclei
  3. inferior colliculi
  4. nuclei of lateral lemniscus
  5. superior olivary nuclei

Answer(s): B

Explanation:

Second-order neurons in the central auditory pathways are located in the dorsal and ventral cochlear nuclei. They receive afferents from the first-order neurons located in the cochlear (spiral) ganglion (choice A). Secondorder fibers from the cochlear nuclei project in turn to the inferior colliculi (choice C), nuclei of lateral lemniscus (choice D), and superior olivary nuclei (choice E).



Arrow 2 in following figure points to which of the following structures?

  1. glomerulus
  2. juxtaglomerular cells
  3. lacis cells
  4. macula densa
  5. vascular pole of the renal corpuscle

Answer(s): D

Explanation:

The macula densa indicated by arrow 2 is a modified segment of the distal tubule at the site of its passage adjacent to the vascular pole of the renal corpuscle. The name arises from the close spacing of nuclei of the epithelial cells forming this part of the distal tubule. These cells are thought tosense the chloride content in the passing filtrate and generate signals that regulate the caliber of the afferent arteriole. The glomerulus (choice A, arrow 1) is a network of capillaries derived from the afferent arteriole and suspended within Bowman's capsule by its vascular pole. The juxtaglomerular cells (choice B) form a cuff around the afferent arteriole prior to its entrance into the glomerulus and they secrete renin. Lacis cells (choice C, arrow 4) are extraglomerular mesangial cells with an uncertain function. The vascular pole (choice E, arrow
3) feeds blood to the glomerulus and carries blood away from it. As part of the juxtaglomerular apparatus, it is closely apposed to the macula densa.



A gang member is rushed to the emergency room suffering from multiple stab wounds made by an ice pick. Athird-year medical student rotating through emergency medicine is puzzled by the sight of a milky white substance exuding from a stab wound just superior to the right sternoclavicular joint. Which of the following structures is possibly injured at this location?

  1. the common carotid artery
  2. the cupola of the right lung
  3. the internal jugular vein
  4. the right lymphatic trunk
  5. the thoracic duct

Answer(s): D

Explanation:

The right lymphatic trunk is ruptured and chyle is exuding from the wound. Blood would flow from a wound involving the common carotid artery (choice A) or internal jugular vein (choice C). Astabbing lesion of the cupola of the right lung (choice B) would result in pneumothorax. The thoracic duct (choice E) does carry chyle. However, the thoracic duct drains into the bifurcation of the internal jugular and subclavian veins on the left side, above the left sternoclavicular joint.



A 72-year-old male patient has suffered a cerebral infarct affecting the left cerebral hemisphere. On examination of the patient, it is noticed that his verbal output is fluent and paraphasic. His comprehension of speech is normal but repetition is severely impaired. Naming is also impaired, although when given a list, the patient is able to select the correct name. Special consultation with a neurologist results in a diagnosis of conduction aphasia. Which of the following brain structures is affected?

  1. arcuate fasciculus
  2. Broca's area
  3. nucleus ambiguous
  4. red nucleus
  5. Wernicke's area

Answer(s): A

Explanation:

The arcuate fasciculus connects Wernicke's area to Broca's area, integrating comprehension of speech with motor speech. A lesion in this connecting bundle results in this unusual condition of conduction aphasia, characterized by impairment of repetition and naming. Broca's area (choice B) is the motor speech area and lesion in this area will result in motor speech impairment. However, this patient's verbal output is fluent. Alesion in the nucleus ambiguus (choice C) will result in dysarthria and also loss of a fluent verbal output. The red nucleus (choice D) is a mesencephalic motor nucleus, which does not participate in the central pathways for speech. Wernicke's area (choice E) is the speech comprehension area, which is intact in this patient because he comprehends spoken language.



Which of the following is characterized by an absence of lymphoid follicles and germinal centers?

  1. axillary lymph node
  2. Peyer's patches
  3. pharyngeal tonsil
  4. spleen
  5. thymus

Answer(s): E

Explanation:

The thymus provides for development of new T lymphocytes in an environment shielded from foreign antigens. Like bone marrow, the thymus is a primary lymphoid organ, and not a site of reactions to foreign antigens. Lymphoid follicles are sites of B lymphocyte proliferation in response to antigen stimulation.
These occur in the lymph nodes (choice A), Peyer's patches (choice B), tonsils (choice C), and white pulp of the spleen (choice D).



Viewing Page 11 of 171



Share your comments for USMLE STEP1 exam with other users:

Paul 10/21/2023 8:25:00 AM

i think it is good question
Anonymous


Unknown 8/15/2023 5:09:00 AM

good for students who wish to give certification.
INDIA


Ch 11/20/2023 10:56:00 PM

is there a google drive link to the images? the links in questions are not working.
AUSTRALIA


Joey 5/16/2023 5:25:00 AM

very promising, looks great, so much wow!
Anonymous


alaska 10/24/2023 5:48:00 AM

i scored 87% on the az-204 exam. thanks! i always trust
GERMANY


nnn 7/9/2023 11:09:00 PM

good need more
Anonymous


User-sfdc 12/29/2023 7:21:00 AM

sample questions seems good
Anonymous


Tamer dam 8/4/2023 10:21:00 AM

huawei is ok
UNITED STATES


YK 12/11/2023 1:10:00 AM

good one nice
JAPAN


de 8/28/2023 2:38:00 AM

please continue
GERMANY


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