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Anatomy MCQs part 1 with key

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1.Which of the following gives rise to the muscular component of dorsal aorta?
A. Intermediate mesoderm
B. Lateral plate mesoderm
C. Axial mesoderm
D. Paraxial mesoderm

Correct answer : B. Lateral plate mesoderm
Vascular smooth muscle cells are thought to arise from splanchnic layer of paraxial mesoderm. But recent studies have shown that the aortic smooth muscle cells arise from the lateral plate mesoderm.


2.Toynbee’s muscle is?
A. Levator ani
B. Tensor tympani
C. Stapedius
D. Scalenus minimus

Correct answer : B. Tensor tympani
3.Deepest layer of scalp is:
a) Connective tissue
b) Aponeurosis (Epicranial Aponeurosis)
c) Loose areolar tissue (Danger area of scalp)
d) None of these
Correct answer: d) None of these
From superficial to deep, the layers of scalp are (mnemonic: SCALP)
  1. S – Skin
  2. C – Connective tissue (fibrofatty)
  3. A – Aponeurosis (Epicranial Aponeurosis)
  4. L – Loose areolar tissue (Danger area of scalp)
  5. P – Periosteum


4.Which of the following movements will not be affected by involvement of the L5 Nerve root?
A. Thigh adduction
B. Knee Flexion
C. Knee Extension
D. Toe Extension
Answer : A. Thigh adduction
Thigh adduction is performed by adductor muscles (magnus, longus, brevis) with gracilis and pectineus acting as accessory muscles. None of them are supplied by L5 nerve root.


5.The Couinaud’s segmental nomenclature is based on the position of the :
A. Hepatic veins and portal vein
B. Hepatic veins and biliary ducts
C. Portal vein and biliary ducts
D. Portal vein and hepatic artery
Correct answer : A. Hepatic veins and portal vein
Couinaud’s segmental nomenclature is based on position of hepatic veins and portal vein. It is the French system.
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