Blood Components
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| Which of the following statements is true concerning human blood? a)The blood of all normal humans contains red and white cells, platelets, & plasma b)Some human populations normally lack the ability to produce plasma | show 🗑
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| Erythrocyte is another name for a)red cell b)white cell c)platelet | show 🗑
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| show | B --> There are numerous types of white cells, many of which function to seek out and destroy alien microbes in our bodies. Some other types of white cells have the function of getting rid of old unneeded blood cells.
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| show | C --> Most of blood`s volume is made up of plasma. As the heart pumps blood to cells throughout the body, the plasma brings them nourishment and removes the waste products of metabolism. It also transports the red and white cells as well as the platelet
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| Which of the following are likely to increase in quantities when the body is under attack from bacteria? a)erythrocytes b)leukocytes c)thrombocytes | show 🗑
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| show | B --> Agglutination is the result of red cells being stuck together by antibodies attaching on to antigens on the alien red cells. Within the body, this recognition-rejection process results in the bursting of alien red cells rather than agglutination.
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| show | A --> They are relatively large protein molecules that identify a blood type. Each antigen type has unique traits that, in a sense, make it like a lock that only a specific antibody key can fit.
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| Most of the volume of normal human blood is composed of: a)red cells b)hemoglobin c)plasma d)white cells | show 🗑
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| show | B --> Microorganisms carry foreign antigens on their surfaces which stimulate the production of white cell antibodies that attack the antigens as a way of getting rid of the invading parasites and subsequently develop an immunity to future attacks.
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| In the ABO blood system, you normally can be type: a)A b)B c)ABO d)A, B, AB, or O | show 🗑
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| show | A --> If they produced anti-A antibodies, it would destroy their own blood. However, they do normally produce anti-B antibodies since B type blood would be alien to them.
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| show | C --> Since type O blood normally lacks both A and B antigens, it will not be recognized as an alien type by the blood of anyone. As a result, anyone usually can be transfused with O blood without concern about rejection for this blood group.
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| show | B --> Karl Landsteiner discovered the ABO system in 1900 and 1901 while trying to understand why blood transfusions sometimes saved lives and at other times caused death.
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| show | C --> In most cases these alleles are totally responsible for determining blood type phenotypes. The inheritance usually follows simple Mendelian patterns. However, there are rare exceptions such as the Bombay Phenotype described in the tutorial.
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| In determining the phenotype for the ABO blood system: a)O is dominant over A b)B is dominant over A c)O is recessive d)all of the above | show 🗑
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| show | E --> Since you could inherit A or O alleles from one parent and B or O alleles from the other, you could be any of the 4 ABO types. Look at the other answers to see how this could be true.
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| show | A --> Because of the Bombay Phenotype and other possible exceptions, the ABO blood type system is not conclusive in determining whether or not someone could be a parent of a particular child. The other two kinds of evidence are much more reliable.
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| show | A,B,C --> Look at the other answers to see further explanations.
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| Which of the following statements is true of the Rh blood system? a)It was the first blood type system to be discovered b)It is more complex genetically than the ABO system c)There are 45 Rh blood types d)b and c | show 🗑
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| show | D --> The most life threatening problem is the result of an Rh blood type incompatibility between a mother and her developing fetus.
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| show | C --> In order for the fetus to be Rh positive, the father must also be Rh positive. As a result, when the mother is Rh negative and the father is Rh positive (or his Rh type is unknown), doctors usually assume that there will be a serious medical prob.
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| show | A --> The Rh blood factor is a dominant trait. Therefore, both DD and Dd people have the Rh antigen on the surface of their red cells which makes them Rh positive.
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| show | A --> Europeans have the highest frequency of Rh negative people (40%), which puts them at the highest risk for this problem. About 13% of newborn Europeans are at risk, but we can now prevent the life threatening complications in most cases.
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| If Dad is Rh + and Mom is Rh - , what are the chances that there will be a mother-fetus incompatibility problem? Assume, they had a child & no medical treatment done to prevent this prob. a)100% b)at least 50% c)less than 50% d)0 % | show 🗑
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| show | A --> As a result of fetal blood entering the mother`s system during her first pregnancy with an Rh positive baby, she will regularly produce antibodies to Rh antigens. They will pass through the placental barrier into her fetus and agglutinate its blood
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| show | C --> In addition to suffering life threatening anemia, they also are usually jaundiced, fevered, quite swollen, and have an enlarged liver and spleen.
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| show | A,B & C --> Look at the other answers to see explanations.
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