ABSA EXAM / AMERICAN BOARD OF SURGICAL ASSISTANT (ABSA) – COMPREHENSIVE
QUESTIONS
AND ANSWERS | VERIFIED AND WELLDETAILED ANSWERS | DETAILED EXPLANATIONS AND
RATIONALES | COMPLETE EXAM PREPARATION STUDY GUIDE | PRACTICE QUESTIONS |
LATEST EXAM UPDATE
• CORE DOMAINS *
•
• Surgical Anatomy and Physiology
• Aseptic Technique, Sterilization, and Infection Prevention
• Surgical Instrumentation, Equipment, and Technology
• Surgical Procedures and Operative Technique
• Surgical Pharmacology, Anesthesia, and Hemostasis
• Patient Positioning, Safety, and Perioperative Care
• Surgical Pathology, Wound Management, and Complications
• Surgical Assisting Responsibilities, Ethics, and Professional Practice
• INTRODUCTION *
•
This comprehensive assessment is designed to strengthen the knowledge and clinical
reasoning expected of a surgical assistant. The questions assess anatomy, physiology, aseptic
technique, instrumentation, operative procedures, patient safety, anesthesia, hemostasis,
wound management, surgical pathology, and professional responsibilities. Multiple-choice
questions are used to evaluate both foundational knowledge and the ability to apply
concepts to realistic perioperative situations. Successful preparation requires understanding
why an intervention is appropriate rather than relying solely on memorization. Scenario-
based and application-focused questions therefore emphasize judgment, anticipation,
communication, safety, and appropriate surgical-assisting practice.
SECTION ONE: QUESTIONS 1–100
Question 1. Which structure is primarily responsible for separating the thoracic cavity from
the abdominal cavity?
A. Transversus abdominis
B. Diaphragm
C. Rectus abdominis
D. Internal intercostal muscle
Correct Answer: B. Diaphragm
,Explanation: The diaphragm is a dome-shaped skeletal muscle that forms the primary
partition between the thoracic and abdominal cavities and is the principal muscle of
inspiration.
Question 2. Which artery is the major arterial supply to the upper limb after it passes the
lateral border of the first rib?
A. Axillary artery
B. Brachial artery
C. Radial artery
D. Subclavian artery
Correct Answer: A. Axillary artery
Explanation: The subclavian artery becomes the axillary artery at the lateral border of the
first rib. It continues as the brachial artery at the inferior border of the teres major muscle.
Question 3. During an abdominal procedure, the surgeon identifies the ligamentum teres.
Which structure is represented by the ligamentum teres hepatis?
A. Obliterated ductus venosus
B. Obliterated umbilical vein
C. Remnant of the vitelline duct
D. Obliterated urachus
Correct Answer: B. Obliterated umbilical vein
Explanation: The ligamentum teres hepatis is the fibrous remnant of the fetal left umbilical
vein and lies within the free margin of the falciform ligament.
Question 4. Which organ is located primarily in the retroperitoneal space?
A. Stomach
B. Spleen
C. Pancreas
D. Transverse colon
Correct Answer: C. Pancreas
Explanation: Most of the pancreas, except for its tail, is retroperitoneal. The stomach,
spleen, and transverse colon are primarily intraperitoneal.
Question 5. Which portion of the small intestine is most commonly affected by Crohn
disease?
A. Duodenum
B. Jejunum only
, C. Terminal ileum
D. Rectum
Correct Answer: C. Terminal ileum
Explanation: Crohn disease can affect any portion of the gastrointestinal tract, but
involvement of the terminal ileum is particularly common. The disease is characterized by
transmural inflammation and skip lesions.
Question 6. Which layer of the gastrointestinal tract contains the myenteric plexus
responsible for coordinating intestinal motility?
A. Mucosa
B. Submucosa
C. Muscularis externa
D. Serosa
Correct Answer: C. Muscularis externa
Explanation: The myenteric or Auerbach plexus lies between the circular and longitudinal
layers of the muscularis externa and plays a major role in regulating gastrointestinal motility.
Question 7. Which structure is the primary site of gas exchange in the lungs?
A. Bronchi
B. Alveoli
C. Trachea
D. Pleura
Correct Answer: B. Alveoli
Explanation: Oxygen and carbon dioxide diffuse across the thin alveolar-capillary membrane.
The large surface area and extensive capillary network of the alveoli facilitate efficient gas
exchange.
Question 8. Which anatomical structure connects the stomach to the proximal small
intestine?
A. Cecum
B. Pylorus
C. Cardia
D. Ileum
Correct Answer: B. Pylorus
Explanation: The pyloric portion of the stomach communicates with the duodenum through
the pyloric sphincter, which regulates gastric emptying.
QUESTIONS
AND ANSWERS | VERIFIED AND WELLDETAILED ANSWERS | DETAILED EXPLANATIONS AND
RATIONALES | COMPLETE EXAM PREPARATION STUDY GUIDE | PRACTICE QUESTIONS |
LATEST EXAM UPDATE
• CORE DOMAINS *
•
• Surgical Anatomy and Physiology
• Aseptic Technique, Sterilization, and Infection Prevention
• Surgical Instrumentation, Equipment, and Technology
• Surgical Procedures and Operative Technique
• Surgical Pharmacology, Anesthesia, and Hemostasis
• Patient Positioning, Safety, and Perioperative Care
• Surgical Pathology, Wound Management, and Complications
• Surgical Assisting Responsibilities, Ethics, and Professional Practice
• INTRODUCTION *
•
This comprehensive assessment is designed to strengthen the knowledge and clinical
reasoning expected of a surgical assistant. The questions assess anatomy, physiology, aseptic
technique, instrumentation, operative procedures, patient safety, anesthesia, hemostasis,
wound management, surgical pathology, and professional responsibilities. Multiple-choice
questions are used to evaluate both foundational knowledge and the ability to apply
concepts to realistic perioperative situations. Successful preparation requires understanding
why an intervention is appropriate rather than relying solely on memorization. Scenario-
based and application-focused questions therefore emphasize judgment, anticipation,
communication, safety, and appropriate surgical-assisting practice.
SECTION ONE: QUESTIONS 1–100
Question 1. Which structure is primarily responsible for separating the thoracic cavity from
the abdominal cavity?
A. Transversus abdominis
B. Diaphragm
C. Rectus abdominis
D. Internal intercostal muscle
Correct Answer: B. Diaphragm
,Explanation: The diaphragm is a dome-shaped skeletal muscle that forms the primary
partition between the thoracic and abdominal cavities and is the principal muscle of
inspiration.
Question 2. Which artery is the major arterial supply to the upper limb after it passes the
lateral border of the first rib?
A. Axillary artery
B. Brachial artery
C. Radial artery
D. Subclavian artery
Correct Answer: A. Axillary artery
Explanation: The subclavian artery becomes the axillary artery at the lateral border of the
first rib. It continues as the brachial artery at the inferior border of the teres major muscle.
Question 3. During an abdominal procedure, the surgeon identifies the ligamentum teres.
Which structure is represented by the ligamentum teres hepatis?
A. Obliterated ductus venosus
B. Obliterated umbilical vein
C. Remnant of the vitelline duct
D. Obliterated urachus
Correct Answer: B. Obliterated umbilical vein
Explanation: The ligamentum teres hepatis is the fibrous remnant of the fetal left umbilical
vein and lies within the free margin of the falciform ligament.
Question 4. Which organ is located primarily in the retroperitoneal space?
A. Stomach
B. Spleen
C. Pancreas
D. Transverse colon
Correct Answer: C. Pancreas
Explanation: Most of the pancreas, except for its tail, is retroperitoneal. The stomach,
spleen, and transverse colon are primarily intraperitoneal.
Question 5. Which portion of the small intestine is most commonly affected by Crohn
disease?
A. Duodenum
B. Jejunum only
, C. Terminal ileum
D. Rectum
Correct Answer: C. Terminal ileum
Explanation: Crohn disease can affect any portion of the gastrointestinal tract, but
involvement of the terminal ileum is particularly common. The disease is characterized by
transmural inflammation and skip lesions.
Question 6. Which layer of the gastrointestinal tract contains the myenteric plexus
responsible for coordinating intestinal motility?
A. Mucosa
B. Submucosa
C. Muscularis externa
D. Serosa
Correct Answer: C. Muscularis externa
Explanation: The myenteric or Auerbach plexus lies between the circular and longitudinal
layers of the muscularis externa and plays a major role in regulating gastrointestinal motility.
Question 7. Which structure is the primary site of gas exchange in the lungs?
A. Bronchi
B. Alveoli
C. Trachea
D. Pleura
Correct Answer: B. Alveoli
Explanation: Oxygen and carbon dioxide diffuse across the thin alveolar-capillary membrane.
The large surface area and extensive capillary network of the alveoli facilitate efficient gas
exchange.
Question 8. Which anatomical structure connects the stomach to the proximal small
intestine?
A. Cecum
B. Pylorus
C. Cardia
D. Ileum
Correct Answer: B. Pylorus
Explanation: The pyloric portion of the stomach communicates with the duodenum through
the pyloric sphincter, which regulates gastric emptying.
