What Will Happen If Platelets Are Absent In The Blood Class 10
Studies show that leucodepletion is best performed at the time of component preparation.
What will happen if platelets are absent in the blood class 10. Question from very important topics are covered by ncert exemplar class 10 you also get idea about the type of questions and method to answer in your class 10th examination. Because this is a recessive disorder both parents carriers have normal platelet number and function. Hla class i and class ii antigens such as lymphocytes and antigen presenting cells. Platelets only express hla class i antigens and leucocyte depleted blood components causes primary hla alloimmunisation in 3 of recipients5.
One type of cells are the red blood cells rbc which contain a red pigment called haemoglobin haemoglobin bind with oxygen and transports it to all the parts of the body and ultimately to all the cells. A newborn child with severe thrombocytopenia 10 000 platelets μl and absence of mks in the bone marrow should raise suspicion for congenital amegakaryocytic thrombocytopenia camt. The classical role attributed to platelets has been in the prevention of bleeding and the initiation of wound healing. Platelets are small anuclear cell fragments that bud off from megakaryocytes specialized large polyploid blood cells that originate in the bone marrow schulze et al 2005 platelets are present at 150 to 400 million per milliliter of blood and circulate for about ten days zucker franklin 2000 in a healthy blood vessel and under normal blood flow platelets do not.
When platelets are absent in blood our body cannot form clots. In addition platelets are able to regulate progenitor cell differentiation into foam cells or endothelial cells depending on the conditions. Here we have provided ncert exemplar problems solutions along with ncert exemplar problems class 10. In the first class the spleen on histo logical examination was found to be packed with platelets.
However platelets are now recognized for their activities independent of thrombosis reviewed in platelets are the second most abundant blood cell only outnumbered by erythrocytes in the circulation approximately 1 5 4 0 10 11 platelets per liter of. Ncert exemplar class 10 science is very important resource for students preparing for x board examination. The cases of the first type seeliger regards as dependent upon an abnormality of the megakaryo cytes which consequently produce abnormal platelets and these being abnormal are removed by the. If there are no platelets in the blood then the blood would not be able to clot.
Platelets clump together and form clots to stop bleeding. Alloimmunization against platelets platelet specific or hla class i antigens refractoriness to platelet transfusion an increase in the platelet count after platelet transfusion that is significantly lower than expected eg 30 of predicted 10 60 min posttransfusion or 20 at 18 24 h posttransfusion. In the second platelets were absent from this organ.
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