Human Immunity and Blood

Haemoconia (or Hemoconia) are small particles of lipids formed by fragmentation of the stroma of erythrocytes (red-blood cells).

Antiserum contains polyclonal antibodies.

Spleen is an organ in which lymphoid tissue and blood are inter-mixed. Here the lymphocytes proliferate, and the worn-out red blood cells are recycled.

Plasma proteins are proteins found in the blood plasma, the clear, protein-rich fluid, which is left behind when platelets, red blood cells and white blood cells are removed from the blood. These proteins play a number of important roles in the human body, and levels of plasma proteins are sometimes evaluated in a laboratory analysis to gather information about a patient's general health and specific health issues, which a patient may be experiencing. Plasma proteins make up around 7% of the total blood volume with levels which can fluctuate at times.

Classification Determinant-8 is a transmembrane glycoprotein present in Regulatory T cell.

This option is correct because Peyer's patches, mucosa-associated lymphoid tissue and adenoids are peripheral lymphoid organs.

Inflammation is the immune system's response where various cells (white blood cells, etc.) are recruited to the site of infection or injury to fight pathogens and begin healing. Infection is the pathogen's invasion, immunization is preventive exposure, and vaccination is a preventive method - none describe the cellular recruitment process.

The immune system identifies and destroys pathogens before infections become severe. When immune function is compromised, even minor gut infections can progress to serious conditions like dysentery with bloody diarrhea, as the body cannot control the infection. The circulatory, respiratory, and nervous systems are not primarily responsible for fighting infections.

The immune system is the body's defense network that identifies and destroys disease-causing microbes through white blood cells, antibodies, and other defense mechanisms. The nervous system transmits signals, the respiratory system handles gas exchange, and the muscular system enables movement - none directly fight pathogens.

Sickle-cell anemia is caused by a genetic mutation that produces abnormal hemoglobin (HbS). When oxygen levels are low, this hemoglobin polymerizes and causes red blood cells to become rigid and sickle-shaped, unlike normal biconcave discs.

Plasma is the fluid (straw-colored liquid) portion of blood that remains when red and white blood cells and platelets are removed. It contains water, proteins, electrolytes, and transports nutrients, hormones, and waste products. Serum is similar but lacks clotting factors, while lymph and tissue fluid are different bodily fluids.

Cell fragments of megakaryocytes yield platelets.

This is correct as blood group is due to antigens on RBC surface.

These cells are the vital part of the cellular immune response,destroying the cells, which bears any foreign antigen on their surface, mainly virus-infected cells.

This immunoglobulin being an antibody plays a vital role in mucosal immunity. It is dominately present in mucous secretions, including tears and saliva.