MBBS Anatomy 2 — Questions and Answers
Question 1: The blood supply to the head of the femur in adults comes primarily from which artery?
- Obturator artery
- Medial circumflex femoral artery (Correct answer)
- Lateral circumflex femoral artery
- Superior gluteal artery
Correct answer: Medial circumflex femoral artery
The medial circumflex femoral artery provides the primary blood supply to the femoral head in adults, which is why femoral neck fractures can lead to avascular necrosis.
Question 2: Which muscle is responsible for depression of the mandible against resistance?
- Masseter
- Temporalis
- Lateral pterygoid
- Digastric (Correct answer)
Correct answer: Digastric
The digastric muscle, along with the mylohyoid and geniohyoid, depresses the mandible and opens the mouth against resistance.
Question 3: The McBurney's point, used to locate appendiceal tenderness, is located at what anatomical position?
- Midpoint of a line from umbilicus to right ASIS
- 1/3 of the way from the right ASIS to the umbilicus (Correct answer)
- 2/3 of the way from the umbilicus to the right ASIS
- Midpoint of the right iliac fossa
Correct answer: 1/3 of the way from the right ASIS to the umbilicus
McBurney's point is located one-third of the distance from the right anterior superior iliac spine (ASIS) to the umbilicus.
Question 4: Which chamber of the heart forms the majority of the anterior surface?
- Right atrium
- Left ventricle
- Right ventricle (Correct answer)
- Left atrium
Correct answer: Right ventricle
The right ventricle forms the majority of the anterior (sternocostal) surface of the heart.
Question 5: The saphenous nerve is a branch of which nerve?
- Obturator nerve
- Femoral nerve (Correct answer)
- Common peroneal nerve
- Sciatic nerve
Correct answer: Femoral nerve
The saphenous nerve is the longest branch of the femoral nerve and supplies sensation to the medial leg and foot.
Question 6: Which segment of the liver is adjacent to the inferior vena cava?
- Segment I (caudate lobe) (Correct answer)
- Segment II
- Segment IV
- Segment VI
Correct answer: Segment I (caudate lobe)
The caudate lobe (Segment I) lies directly anterior to the inferior vena cava and drains directly into it.
MBBS Anatomy 2
The blood supply to the head of the femur in adults comes primarily from which artery?