Tag: blood circulatory system of human
Questions Related to blood circulatory system of human
The solid part of blood is
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Plasma
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Red blood corpuscles
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White blood corpuscles
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Red, white corpuscles and platelets
Blood is living tissue which is made up of liquid and solids. The liquid part, called as plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets. Red blood cells deliver oxygen from your lungs to your tissues and organs. White blood cells fight infection and are part of your body's defense system. Platelets help blood to clot when you have a cut or wound. Bone marrow, the spongy material inside your bones, makes new blood cells. Blood cells constantly die and your body makes new ones. Red blood cells live about 120 days, and platelets live about 6 days. Some white blood cells live less than a day, but others live much longer.
Which one of the following is wrong?
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White blood cells or leucocytes are considered as 'soldiers' of the body.
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Antibodies are product by the stem cells of bone marrow.
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Calcium ions in blood play an important role in blood clot formation.
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Blood platelets are cell fragments, devoid of nuclei and participate in the coagulation of blood.
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.
Blood clot inside a blood vessel is called as
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Thrombosis
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Agglutinin
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Clot
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Thrombus
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.
Which of the following cells has a lifespan of 5-9 days?
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WBC
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Platelets
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RBC
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None of the above
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.
Which of the following blood cells help in blood coagulation?
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RBCs
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Lymphocytes
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Thrombocytes
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Basophils
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'.
Formation of platelets is known as
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Haemopoiesis
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Thrombopoiesis
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Haemolysis
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None of the above
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.
Blood platelets are present in the blood of
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Fishes
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Amphibians
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Reptiles
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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).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.
Blood platelets are
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Nucleated
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Nucleus is many lobed
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Nucleus is very small
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Denucleated
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.
Haemorrhagic disorder occurs when the platelet count falls to less than ________________.
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$1,50,000/mm^3$
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$1,00,000/mm^3$
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$75,000/mm^3$
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$50,000/mm^3$
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.
Which of the following blood cells help in blood coagulation?
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RBCs
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Lymphocytes
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Thrombocytes
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Basophils
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.