Pg Blazer - Online Test Series 21 - Anatomy

The common peroneal nerve is related to the neck of the fibula. The common peroneal nerve is a branch of the sciatic nerve and it wraps around the neck of the fibula. This nerve is responsible for providing sensation to the skin on the front and side of the lower leg, as well as controlling the muscles that help with dorsiflexion (lifting the foot upwards) and eversion (turning the foot outwards).

The movements of supination and pronation occur at the Superior radioulnar joint, Middle radioulnar joint, and Inferior radioulnar joint. However, they do not occur at the Radio-carpal joint.

The trigone of the bladder is a triangular area located between the openings of the two ureters and the urethra. It is lined by transitional epithelium, which allows the bladder to stretch and accommodate urine. The mucosa of the trigone is smooth, meaning it lacks any folds or protrusions. However, it is not loosely attached to the underlying musculature. In fact, the mucosa is firmly attached to the muscular layer of the bladder, providing support and stability. Therefore, the correct answer is that the mucosa is not loosely attached to the underlying musculature.

The structures passing posterior to the diaphragm include the aorta, azygos vein, and thoracic duct. The greater splanchnic nerve, on the other hand, does not pass posterior to the diaphragm. It is a sympathetic nerve that originates from the sympathetic trunk and passes through the diaphragm to innervate the abdominal viscera. Therefore, the greater splanchnic nerve is the correct answer as it is the only structure listed that does not pass posterior to the diaphragm.

The oculomotor nerve is responsible for carrying parasympathetic nerve fibers, supplying the inferior oblique muscle, and causing constriction of the pupil. However, it does not enter the orbit through the inferior orbital fissure.

A midline cleft lip occurs when there is a failure of fusion between the medial nasal processes. During embryonic development, the face develops from separate facial processes that eventually fuse together. The medial nasal processes are responsible for forming the middle portion of the upper lip. If there is a failure of fusion between these processes, it can result in a midline cleft lip, where there is a gap or separation in the middle of the upper lip.

The pudendal nerve supplies the motor part to the external sphincter. The nerve is derived from the S2-S3 roots.

Lumber hemivertebra is caused by the abnormal development of the ventral sclerotome. The sclerotome is a group of cells that eventually form the vertebrae in the spine. In the case of lumber hemivertebra, there is a defect in the development of the ventral sclerotome, leading to an abnormal vertebrae formation. This can result in a variety of spinal abnormalities and can cause issues with spinal alignment and function.

In cases of inferior vena cava (IVC) obstruction, collateral veins may develop to bypass the obstruction. The correct answer states that the collateral veins that open up in this situation are all except the superficial epigastric and iliolumbar veins. This means that the superficial epigastric and iliolumbar veins are not involved in the development of collateral circulation in IVC obstruction.

The cardiac jelly formed around the heart tube during early development contributes to the formation of the endocardium. The endocardium is the innermost layer of the heart and lines the chambers and valves. It is composed of connective tissue and endothelial cells and helps to regulate blood flow and prevent clotting. The cardiac jelly provides a supportive matrix for the development of the endocardium, allowing it to form and function properly.