NEET-PG 2024 - Anatomy Practice Questions

Q: Identify the arrow marked nerve

Lateral pectoral nerve. ***Lateral pectoral nerve*** - The arrow points to a nerve originating from the **lateral cord of the brachial plexus**, traveling laterally to innervate the **pectoralis major muscle**. - Its position, lateral to the medial pectoral nerve and supplying the pectoralis major, confirms it as the lateral pectoral nerve. *Medial pectoral nerve* - The medial pectoral nerve typically arises from the **medial cord of the brachial plexus** and passes through both **pectoralis major** and **pectoralis minor**. - It lies more medially and generally pierces the pectoralis minor, unlike the nerve indicated. *Long thoracic nerve* - The long thoracic nerve innervates the **serratus anterior muscle** and runs along the lateral aspect of the chest wall. - Its course is distal and distinct from the nerve shown, which is clearly positioned in the pectoral region. *Thoracodorsal nerve* - The thoracodorsal nerve innervates the **latissimus dorsi muscle** and descends on the posterior axillary wall. - It is not located in the shown pectoral region and has a different trajectory. *Nerve to subclavius* - The nerve to subclavius arises from the **upper trunk of the brachial plexus** (C5-C6) and descends to innervate the **subclavius muscle**. - It has a more superior course compared to the lateral pectoral nerve and is not visible in the position indicated by the arrow.

Q: The Image shows the growth curve of different organs with age. Identify A in the graph.

Lymphoid Growth. ***Lymphoid Growth*** - Curve 'A' shows a rapid increase in size during **childhood**, peaking around **10-12 years of age**, and then declining to adult levels. - This pattern is characteristic of **lymphoid tissues** (e.g., thymus, lymph nodes, tonsils), which are larger relative to body size in childhood and undergo involution post-puberty. *Brain Growth* - **Neural growth** (like the brain) typically shows very rapid growth in early childhood, reaching close to adult size by about 6-7 years of age, and then leveling off. - Curve 'A' continues to grow rapidly much longer than expected for brain development and then shows a distinct decline. *Somatic Growth* - **General somatic growth** (e.g., body as a whole) shows a sigmoid curve, with rapid growth in infancy and adolescence, and a plateau in adulthood. - Curve 'A' peaks significantly above the 100% mark and then declines, which is not characteristic of overall somatic growth. *Gonadal Growth* - **Genital (gonadal) growth** remains relatively flat until puberty, after which it experiences a rapid increase. - Curve 'A' shows significant growth in early childhood and a peak before puberty, which is inconsistent with typical gonadal development. *Reproductive Growth* - **Reproductive growth** follows the same pattern as gonadal growth, remaining minimal until puberty with subsequent rapid increase. - Curve 'A' demonstrates early childhood growth and pre-pubertal peak, which does not match the reproductive growth pattern.

Question 1

Identify the arrow marked nerve

Accepted Answer

Lateral pectoral nerve

Answer

Medial pectoral nerve

Answer

Long thoracic nerve

Answer

Thoracodorsal nerve

Answer

Nerve to subclavius

Question 2

Identify the labeled structures correctly in the axial CT image of the thorax

Accepted Answer

A - Ascending aorta, B - Pulmonary trunk, C - Superior vena cava, D - Descending aorta

Answer

A - Pulmonary trunk, B - Ascending aorta, C - Superior vena cava, D - Descending aorta

Answer

A - Superior vena cava, B - Pulmonary trunk, C - Ascending aorta, D - Descending aorta

Answer

A - Ascending aorta, B - Superior vena cava, C - Pulmonary trunk, D - Descending aorta

Answer

A - Pulmonary trunk, B - Superior vena cava, C - Ascending aorta, D - Descending aorta

Question 3

The Image shows the growth curve of different organs with age. Identify A in the graph.

Accepted Answer

Lymphoid Growth

Answer

Brain Growth

Answer

Somatic Growth

Answer

Gonadal Growth

Answer

Reproductive Growth

NEET-PG 2024 — Anatomy