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Introduction to Healthcare Science > Haematology > Flashcards

Flashcards in Haematology Deck (70)
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61

When blood transfused why is it usually leukodepleted?

- To protect the recipient as this will reduce the risk of some infections and transfusion reactions.

62

Where is ABO gene found?

- It's an autosomal gene found on chromosome 9.
- A + B are dominant over O and A + B are co-dominant.

63

Which antibodies do people with blood groups A, B, AB and O produce?

- A produce anti B antibodies.
- B produce anti A antibodies.
- AB produce neither anti A or anti B antibodies.
- O produce both anti A and anti B antibodies.

64

Which blood type is the universal recipient and which is the universal donor?

- Universal donor: O.
- Universal recipient: AB.

65

What is blood?

- it's a multifunctional tissue.
- it's considered a form of fluid connective tissue as has the same embryonic origin as other connective tissues (mesodermal).
- it connects the body systems together (O2, nutrients, waste disposal etc.).

66

What is erythropoiesis?

- process which produces red blood cells.

67

How do platelets stop bleeding?

- at site of injury there will be damage and bleeding.
- vasoconstriction occurs.
- platelet adhesion and aggregate and form a plug.
- this activates a clotting cascade.
- regeneration of fibrin strands form a mesh amount platelets.

68

What is bone marrow?

- it's a flexible tissue in the anterior of bones.
- in humans red blood cells are produced by cores of bone marrow in the heads of long bones in a process known as haematopoesis.
- bone marrow is also a key component of the lymphatic system, producing the lymphocytes that support the bodies immune system.

69

What is the thymus?

- primary lymphoid organ of the immune system.
- with the thymus t lymphocytes (t-cells) mature.
- located in front of the heart and behind the sternum.
- composed of two identical lobes.
- thymus provides an inductive environment for development of T cells from hematopoetic progenitor cells.
- largest and most active during neonatal and pre-adolescent periods.

70

What is the normal RBC count?

- males: 4.5-6.5x10(12)/L.
- females: 3.9-5.6x10 (12)/L.