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ABO blood group system

Blood Types

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ABO and Rh Blood Groups Blood type is inherited from your parents and is determined by the presence or absence of certain antigens, or agglutinogens, on the surface of red blood cells. Blood plasma also contains specific antibodies, or agglutinins. These antibody molecules will react to foreign antigens causing those cells to burst, a process called hemolysis. This is why it?s important to perform blood type testing before blood transfusions. There are several types of surface antigens on blood cells, but the ABO and Rh antigens are the most common. Rh Blood Group: The Rh blood groups has two types, Rh positive and Rh negative. The Rh surface antigen is also called the D antigen. If the antigen is present, the type is Rh+ and if it is absent, the type is Rh-.

AP Human Geog Chapter 1

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Chapter: Chapter01: Introduction to Human Geography Multiple Choice 1. It is estimated that _____ of the world?s population is seriously malnourished. a) 1/20th b) 1/10th c) 1/6th d) ? Ans: C Link to: 1.0 Difficulty: Easy Topic: Intro. to Human Geography Type: Factual 2. Most of the one billion malnourished people in the world: a) have little power b) have little money c) are women or children d) all of the above Ans: D Link to: 1.0 Difficulty: Moderate Topic: Intro. to Human Geography Type: Applied/Critical Thinking 3. Much of Kenya?s income comes from: a) oil b) coffee and tea production c) iron ore d) tourism Ans: B Link to: 1.0 Difficulty: Moderate Topic: Intro. to Human Geography Type: Factual 4. _____% of Kenya?s land is arable. a) 72 b) 48 c) 23 d) 8
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