Predictions 1. When exercising subjects move from low to high altitude, Hct will increase 2. When exercising subjects move from low to high altitude, Hb will decrease 8. Agglutination will occur when type O blood is mixed with the anti-A serum Materials and Methods Effect of Altitude on Hematocrit and Hemoglobin Concentration 1. Dependent Variable: Hct and Hb 2. Independent Variable: altitude B. Controlled Variables: gender, age ABO and Rh Typing in Family Members 1. Dependent Variable: presence or absence of agglutination 2. Independent Variable: type of antigen on RBCS 8. Controlled Variables: no controlled variables 1. When exercising subjects move from low to high altitude, Hct will: 5. When exercising subjects move from low to high altitude, Hb will: 5. Agglutination will occur:

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