Biology

Biology, 19.07.2019 01:00, ejcastilllo

Persons with blood type often called universal recipients because_

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Mathematics, 16.07.2019 18:00, zzk8

Match the following items. in a group of 100 persons, 85 had rh positive blood (rh factor present), 45 had type o blood, and 38 had both type o and rh positive blood. if one person had been selected at random from the group, what would the probability be: 1. that his blood type was type o and rh+? 1 19/50 2. that his blood type was not o? 4 7/100 3. that his blood type was rh-? 5 3/20 4. that his blood type was type o and rh-? 3 11/20 5. that his blood type was rh+? 2 17/20 6. that his blood type was not type o or else was rh+? 6 93/100

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Medicine, 19.07.2019 21:30, ingridskoerber

An antigen is a substance that can activate the immune system to produce antibodies. in the blood, the reaction of antibodies and antigens can cause clumping - never a good thing. the abo and rh blood typing systems are based on certain antigen molecules on the plasma surfaces of red blood cells. type 0- blood has been identified as universal donor blood type because it has "zero" antigens to a, b or rh on its red blood cells - so there is no danger of a recipient's anti-a, anti-b or anti-rh antibodies clumping the donated "o" red blood cells during a transfusion. in contrast, a different blood type is called the universal recipient blood type. what blood type is called the universal recipient blood type, and why? a. the universal recipient blood is ab+. because it has the a, b and rh antigens on its cell membranes, it has no antibodies to a, b or rh antigens its blood plasma. if it did, the blood would agglutinate itself, so to speak. therefore, there is no danger of an ab+ recipient's blood clumping donated red blood cells which have a, b or rh antigens. b. the universal recipient blood is abo. it does not contain any anti-a, anti-b, or anti-rh antibodies in its plasma. therefore, type ab- blood does not clump any donor’s red blood cells containing a, b, or rh antigens. c. the universal recipient blood is 0- that has been cross-matched for minor antigens. d. none of the above

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Mathematics, 06.09.2019 04:30, jos1319

Match the following items. in a group of 100 persons, 85 had rh positive blood (rh factor present, rh+), 45 had type o blood, and 38 had both type o and rh positive blood. if one person had been selected at random from the group, what would the probability be: 1. that his blood type was type o and rh+? 19/50 2. that his blood type was not o? 93/100 3. that his blood type was rh-? 7/100 4. that his blood type was type o and rh-? 17/20 5. that his blood type was rh+? 11/20 6. that his blood type was not type o or else was rh+? 3/20

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Mathematics, 19.10.2019 01:10, lily2998

The blood type o negative is called the "universal donor" type because it is the only blood type that may safely be transfused into any person. therefore, when someone needs a transfusion in an emergency and their blood type cannot be determined, they are given type o negative blood. for this reason, donors with this blood type are crucial to blood banks. unfortunately, this blood type is fairly rare; according to the red cross, only 7 percentage of u.s. residents have type o negative blood. assume that a blood bank has recruited 20 unrelated donors. (state calculator entry and give 4 decimal places) what is the probability that fewer than three of them will have type o negative blood? what is the probability that more than 4 of them have type o negative blood? find the probability that none of the donors had type o negative blood. would this be unusual? explain. what is the mean of the number of donors who have type o negative blood for a group this size? what is the standard deviation of the number of donors who have type o negative blood for a group this size?

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