Science 30 Diploma Examination January 2001

2. When blood flows from the lungs, through the heart, to the body tissues, it travelsthrough, respectively, theA. atrium, ventricle, and aortaB. ventricle, aorta, and atriumC. aorta, atrium, and ventricleD. atrium, aorta, and ventricleUse the following information to answer the next two questions.Normal Hydronium Ion Concentration [H 3 O + (aq)] of Some Body FluidsFluid [H 3 O + (aq) ]1 blood 4.0 × 10 –8 mol/L2 urine 5.0 × 10 –6 mol/L3 stomach fluid 2.0 × 10 –2 mol/L4 saliva 1.6 × 10 –7 mol/LNumerical Response2. Listed in order from most acidic to least acidic, the fluids above are:__________ , __________ , __________ , and __________.most acidic least acidic(Record all four digits of your answer in the numerical-response section on the answer sheet.)Numerical Response3. According to the chart above, the pH of the urine is __________.(Record your three-digit answer in the numerical-response section on the answer sheet.)2