Question 1:
State the blood group which is the universal donor.
Answer:
Blood group O
State the blood group which is the universal donor.
Answer:
Blood group O
Question 2:
Predict what will happen if the blood group of both recipient and donor is not compatible.
Answer:
The blood of the recipient will undergo agglutination.
Predict what will happen if the blood group of both recipient and donor is not compatible.
Answer:
The blood of the recipient will undergo agglutination.
Question 3:
Three babies P, Q and R have blood groups B, O and AB respectively. Three pairs of parents have the following blood groups:
The first pair of parents: B and O
The second pair of parents: A and B
The third pair of parents: AB and O
Match the babies with their correct parents.
Answer:
Three babies P, Q and R have blood groups B, O and AB respectively. Three pairs of parents have the following blood groups:
The first pair of parents: B and O
The second pair of parents: A and B
The third pair of parents: AB and O
Match the babies with their correct parents.
Answer:
Question 4:
An Rh-positive male marries an Rh-negative female. The first Rh-positive child is alive but the second child who is also Rh-positive did not survive. Explain why.
Answer:
• In the final month of pregnancy, fragments of the first child’s blood cells that has Rhesus antigen mixes with the mother’s blood through the shedding placenta.
• This induces the mother’s immune system to produce antibodies against the Rhesus antigen.
• The antibodies (anti-Rhesus) formed flow across the placenta into the fetal blood circulatory system.
• Normally, the quantity of antibodies formed is not enough to affect the firstborn.
• However, the antibodies that can destroy red blood cells remain in the mother’s blood.
• When a second child is conceived, which is also Rhesus positive, a small amount of fetal blood that enters the mother’s blood will induce more anti-Rhesus secretion.
• Antibodies that diffuse into the fetal blood circulatory system will destroy the fetal’s red blood cells
• The fetal’s red blood cells experience haemolysis.
An Rh-positive male marries an Rh-negative female. The first Rh-positive child is alive but the second child who is also Rh-positive did not survive. Explain why.
Answer:
• In the final month of pregnancy, fragments of the first child’s blood cells that has Rhesus antigen mixes with the mother’s blood through the shedding placenta.
• This induces the mother’s immune system to produce antibodies against the Rhesus antigen.
• The antibodies (anti-Rhesus) formed flow across the placenta into the fetal blood circulatory system.
• Normally, the quantity of antibodies formed is not enough to affect the firstborn.
• However, the antibodies that can destroy red blood cells remain in the mother’s blood.
• When a second child is conceived, which is also Rhesus positive, a small amount of fetal blood that enters the mother’s blood will induce more anti-Rhesus secretion.
• Antibodies that diffuse into the fetal blood circulatory system will destroy the fetal’s red blood cells
• The fetal’s red blood cells experience haemolysis.