Question

1. a universal donor is a person with which of the following blood types? (a) o negative (b) a positive (c) ab positive (d) b negative 7. blood enters the right atrium of the heart from the (a) aorta (b) left ventricle (c) pulmonary vein (d) vena cava 8. which of the following substances has the highest ph? (a) ammonia (b) battery acid (c) isopropyl alcohol (d) water

Explanation:

• For question 6: Blood type O negative lacks A, B, and Rh antigens, making it compatible with all blood - types for transfusion, thus it's the universal donor.
• For question 7: Deoxygenated blood from the body enters the right atrium of the heart through the vena cava.
• For question 8: Ammonia is a base and has a pH greater than 7. Battery acid is acidic (pH < 7), isopropyl alcohol is neutral to slightly acidic, and water has a pH of 7. So ammonia has the highest pH among the options.

Answer:

1. A. O negative
2. D. vena cava
3. A. ammonia