14 Questions
What percentage of donors have O positive blood type?
35%
Which blood type is known as the universal blood type?
O negative
How many main blood groups are in the ABO group system?
4
What determines the letter part of your blood type?
ABO group system
What are antigens?
Sugars and proteins on the surface of a red blood cell
What determines the positive or negative part of your blood type?
R h system
Can you receive blood from a donor with a different blood type?
Yes, you can receive blood from a donor with a compatible blood type
Where are antigens located on a red blood cell?
On the surface of the red blood cell
What is the role of antibodies in the body's natural defense system?
To recognize and destroy 'foreign' antigens
What determines an individual's ABO blood group?
The presence of A and B antigens and corresponding antibodies
What is the characteristic of an individual with blood group O?
Antigens on red cells: none, antibodies in plasma: anti-A and anti-B
What determines whether an individual's blood type is positive or negative?
The presence of Rh D antigen
What percentage of donors are Rh D positive?
77%
What is the role of the four other main antigens in the Rh system?
They make up an individual's blood subtype
Study Notes
Finding Your Blood Type
- You can find out your blood type after your first blood donation.
Blood Types and Their Frequencies
- There are eight main blood types, with frequencies: • O positive: 35% • O negative: 13% • A positive: 30% • A negative: 8% • B positive: 8% • B negative: 2% • AB positive: 2% • AB negative: 1%
Blood Type Compatibility
- You can receive blood from a donor with the same blood type as you.
- You can also receive blood from a donor with a compatible blood type.
- O negative blood is the universal blood type, safe for everyone to receive.
Inheritance of Blood Type
- Your blood group is inherited from genes passed on by your parents.
- The ABO group system gives the letter part of your blood type.
- The R h system gives the positive or negative part of your blood type.
ABO Group System
- There are four main blood groups in the ABO group system.
- E ach group is important, and we need donors from every group.
- Your blood group depends on the antigens and antibodies in your blood.
Antigens and Antibodies
- Antigens are a combination of sugars and proteins that coat the surface of a red blood cell.
- Antibodies are important in transfusion as they are the body's natural defense system.
- Giving someone blood from the wrong ABO group can be life-threatening.
Blood Groups
- Blood group O: no antigens, with anti-A and anti-B antibodies.
- Blood group A: A antigens, with anti-B antibodies.
- Blood group B: B antigens, with anti-A antibodies.
- Blood group AB: A and B antigens, with no antibodies.
Positive or Negative Blood
- The D antigen in the R h system determines whether you have positive or negative blood.
- If you have the R h D antigen, your blood type is positive; if you lack it, your blood type is negative.
Learn about the different blood types, their frequencies, and blood type compatibility. Understand which blood types are compatible with each other.
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