Question

question 54 (0.5 points)
saras erythrocytes contain b agglutinogens on their cell membrane. which statement is most true?
sara can safely donate her erythrocytes to a person with type ab blood.
sara has type a blood
sara can safely donate her whole blood to person with type o blood.
sara can safely receive type o - whole blood from a donor.

Explanation:

1. Analyze Sara's blood type: Agglutinogens (antigens) on erythrocytes determine blood type. B agglutinogens mean Sara has Type B blood (so "Sara has Type A blood" is wrong).
2. Analyze blood donation/reception rules:

• Type AB blood (universal recipient) can receive from A, B, AB, O. So Sara (Type B) can donate erythrocytes (which have B antigens) to AB (since AB has both A and B antibodies? No, AB has no anti - A or anti - B antibodies in plasma. Wait, for erythrocyte donation, Type AB can receive Type B erythrocytes (as AB's plasma won't agglutinate B antigens).
• Type O is universal donor, but can only receive from O (since O has anti - A and anti - B in plasma). So Sara (Type B) can't donate whole blood to O (O's plasma has anti - B which would agglutinate Sara's B antigens).
• For receiving, Type B can receive from B or O (whole blood). But the option about receiving Type O whole blood: Wait, no, the question is about which statement is most true. Wait, let's re - check:
• Option 1: Sara (Type B) donating erythrocytes to AB. AB's plasma has no anti - B (since AB has A and B antigens, so no anti - A or anti - B antibodies). So erythrocytes with B antigens can be donated to AB.
• Option 3: Donating whole blood to O. O's plasma has anti - B, which would react with Sara's B antigens in whole blood (erythrocytes), so this is wrong.
• Option 4: Receiving Type O whole blood. Type B can receive Type O whole blood? Wait, Type O whole blood has anti - A and anti - B in plasma. Wait, no, when receiving whole blood, the donor's plasma (with antibodies) and recipient's erythrocytes. Wait, no, the recipient's plasma and donor's erythrocytes. Wait, maybe I messed up. Let's clarify blood typing:
• Blood type is determined by antigens on erythrocytes. Plasma has antibodies against the antigens not present.
• Type B: Erythrocytes have B antigen, plasma has anti - A.
• Type AB: Erythrocytes have A and B, plasma has no antibodies.
• Type O: Erythrocytes have no antigens, plasma has anti - A and anti - B.
• So for erythrocyte donation (just erythrocytes, no plasma), Type AB can take A, B, AB, O erythrocytes (since AB's plasma has no antibodies to agglutinate them). So Sara (Type B) donating erythrocytes to AB is possible.
• For whole blood donation: Whole blood has both erythrocytes (with antigens) and plasma (with antibodies). So when Sara (Type B) donates whole blood to O, O's plasma has anti - B which will agglutinate Sara's B - antigen - bearing erythrocytes. So that's wrong.
• The option about receiving Type O whole blood: Type B can receive whole blood from O? Wait, O's whole blood has anti - A and anti - B in plasma. Sara's (Type B) erythrocytes have B antigen. O's plasma has anti - B, which would agglutinate Sara's erythrocytes. So that's wrong.
• So the correct option is "Sara can safely donate her erythrocytes to a person with Type AB blood."

Answer:

A. Sara can safely donate her erythrocytes to a person with Type AB blood.