National Board of Medical Examiners (NBME)
NBME USMLE (United States Medical Licensing
Examination): USMLE Step 1, 2 and 3
NBME CBSSA & NBME CBSE Comprehensive Basic
Science Self- Assessment and Examination
Course Title and Number: NBME CBSSA, NBME CBSE, and
NBME USMLE Exam
Exam Title: NBME
Exam Date: Exam 2025- 2026
Instructor: ____ [Insert Instructor’s Name] _______
Student Name: ___ [Insert Student’s Name] _____
Student ID: ____ [Insert Student ID] _____________
Examination
Time: - ____ Hours: ___ Minutes
Instructions:
1. Read each question carefully.
2. Answer all questions.
3. Use the provided answer sheet to mark your responses.
4. Ensure all answers are final before submitting the exam.
5. Please answer each question below and click Submit when you
have completed the Exam.
6. This test has a time limit, The test will save and submit
automatically when the time expires
7. This is Exam which will assess your knowledge on the course
Learning Resources.
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NBME CBSSA and CBSE Exam Review NBME
Comprehensive Basic Science Exams Review
Questions and Answers | 100% Pass Guaranteed |
Graded A+ |
2025- 2026
NBME CBSSA & NBME CBSE Comprehensive
Basic Science Self- Assessment and Examination
NBME USMLE (United States Medical Licensing
Examination): USMLE Step 1, 2 and 3
Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
1. defect in development of the first pharyngeal arch
leads to?: - hypoplasia of mandible and micrognathia
leading to posterior displacement of the tongue --> airway
obstruction, hypoxia, feeding difficulty, and respiratory
distress
**Pierre Robin Syndrome
2. 2nd pharyngeal arch leads to development of?: middle
ear, hyoid bone, tem- poral styloid process, and muscles
including facial muscles, stapedius, platysma, and stylohyoid;
CN VII
3. 3rd pharyngeal arch leads to development of?:
stylopharyngeus muscle and glossopharyngeal nerve (CN IX)
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4. 4th pharyngeal arch leads to development of?:
cricothyroid muscle and mus- cles of soft palate as well as
thyroid cartilage; innervated by superior laryngeal branch of
vagus nerve
5. 6th pharyngeal arch leads to development of?: all
intrinsic muscles of the lar- ynx except the cricothyroid
muscle, the cricoid, arytenoid, corniculate and cuneiform
cartilages; innervated by laryngeal branch of vagus nerve
6. hair pulling disorder?: trichotillomania
**broken hairs are different lengths
7. alopecia areata: chronic, immune mediated disorder of hair
loss can present with diffuse or focal hair loss
areas may demonstrate smooth or irregular borders
hairs are typically narrower proximally than distally and are
prone to breaking
**broken hairs are usually the same length
8. fibronectin: component of the ECM
**renal mesangial cells grow in a medium that promotes the
formation of ECM would be expected to express increased
levels of fibronectin mRNA
9. main driving force for increased cerebral blood flow
is?: increased carbon dioxide concentration in the blood
10. clinical signs of hypocalcemia include?: perioral
paresthesia, carpopedal spasm, laryngospasm, and
prolonged QT interval
11. major s/e of beta-adrenergic blockers like
propanolol: decreased HR and contractility, bronchospasm,
and hypoglycemia
12. increased sarcomeres in an array in parallel with
each other indicates?: -
concentric hypertrophy most commonly d/t HTN and aortic
stenosis
**pressure overload
13. increased sarcomeres in an array in series with
each other indicates?: ec- centric hypertrophy most
commonly d/t dilated cardiomyopathy
**volume overload
14. increased sarcomeres with decreased abundance of
F-actin may be seen in?: genetic cardiomyocyte disorders
such as hypertrophic cardiomyopathy
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