97688

HLA class I antigens are the principal antigens that induce an immune response in the host against transplanted tissues.

69288

The osmotic fragility test is the most relevant investigation for diagnosing hereditary spherocytosis, as it assesses the red blood cells' ability to withstand osmotic stress.

61858

Tumour cells have genetic alterations which result in expression of nonself proteins: This is the most accurate statement regarding immune surveillance. Tumor cells often undergo genetic mutations that lead to the expression of abnormal proteins (neoantigens) that are not present in normal cells. These nonself proteins can be recognized by the immune system as foreign, triggering an immune response. This recognition is a key aspect of how immune surveillance functions effectively against tumors.

50673

The primary target of alcohol toxicity in the liver is the mitochondri1) Alcohol is metabolized in the liver, generating acetaldehyde and reactive oxygen species, which can disrupt mitochondrial function and lead to cell damage and necrosis.

86703

47790

Chronic granulocytic leukemia is due to chromosomal translocation.

15935

Explanation: In bilateral balanced occlusion, if the incisal guidance is steep, it is necessary to create a compensating curve that is also steep to maintain balanced occlusion during lateral movements. This helps to ensure that the occlusal contacts remain balanced and stable, preventing tipping or dislodgment of the denture during function. The other options do not adequately address the need for balance in occlusion.

80710

E. coli O157:H7 is the most commonly identified serotype of EHEC and is associated with outbreaks related to the consumption of inadequately cooked ground beef, milk, and vegetables. It produces Shiga-like toxins, which can cause hemolytic uremic syndrome.

38422

The part of the instrument that should remain parallel to the long axis of the tooth is the shank.

15840

Internal resorption is a condition where the dentin and pulp of a tooth are resorbed internally. It is often a result of chronic inflammation of the pulp. Radiographically, it appears as an enlargement of the pulp space, which can give the tooth a pinkish hue clinically (pink tooth of Mummery). The process involves clastic cells that resorb the dental hard tissues.