Tag: defence against infectious disease

An antibody is a large, Y-shaped protein produced by the plasma cells that is used by the immune system to identify and neutralize pathogens such as bacteria and viruses. The antibody recognizes a unique molecule of the harmful agent (antigen), via the variable region. They are not formed by the stem cells. All the other statements are correct.
Therefore, the correct answer is option B.

The blood clot formed inside the blood vessel is called as a thrombus. When this thrombus breaks and travels to different parts of the body, then it is called embolus. Agglutinin is responsible for the agglutination.

The platelets are formed by fragmenting from cells found in bone marrow called as megakaryocytes, and similar to red blood cells, they do not have a nucleus. The average lifespan of a platelet is normally just 5 to 9 days.  

Red blood cells or RBCs are the most common type of blood cell and contains hemoglobin, which is the principal means of delivering oxygen.
Lymphocyte is a type of white blood cell, that is important in the immune system.
Basophils are granulocytes i.e., they contain large cytoplasmic granules in the cell nucleus and it stores histamine (a vasodilator).
Thrombocyte is a platelet and is crucial for blood clotting.
Thus, the correct answer is option (C), 'Thrombocytes'.

Platelets or thrombocytes are cell fragments produced from megakaryocytes (special cells in the bone marrow). Formation of platelets by fragmentation of megakaryocytes in bone marrow is known as thrombopoiesis.

The blood cells are of three major types they are erythrocytes(RBC), leucocytes(WBC) and platelets. Platelets or thrombocytes are cell fragments produced from megakaryocytes (special cells in the bone marrow).Blood normally contains 1,500,00 - 3,500,00 platelets mm – 3. Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood.  Blood platelets are present in the blood of Mammals.

The blood cells are of three major types they are erythrocytes(RBC), leucocytes(WBC) and platelets. Platelets or thrombocytes are cell fragments produced from megakaryocytes (special cells in the bone marrow). Formation of platelets by fragmentation of megakaryocytes in bone marrow is known as thrombopoiesis. As blood platelets are cell fragments they do not have any nucleus i.e Denucleated.

Hemorrhagic Disorders Spontaneous or near spontaneous bleeding caused by a defect in clotting mechanisms (blood coagulation disorders) or another abnormality causing a structural flaw in the blood vessels. Platelets play an important role in blood clotting, so thrombocytopenia puts you at higher risk of bleeding. Any time your platelet count drops below 50,000 per mm3 you are considered to be at increased risk for bleeding.

Thrombocytes are pieces of very large cells in the bone marrow called megakaryocytes. They help form blood clots to slow or stop bleeding and to help wounds heal.