Q.1.
Which blood types are considered universal donors?

People that have O -ve blood groups are considered universal blood donors. This means that the O –ve blood can be used for transfusions for any blood types.

Q.2.
Which blood types are considered universal recipients?

People with AB+ blood groups are regarded as universal recipients. This means that they can receive blood from any of the four blood groups.

Q.3.
What is the other name for Rh antigen?

Rh antigens are certain proteins that are present in our red blood cells. Their presence or absence in our body is referred to Rh factor.

Q.4.
Which sign in the blood group tells us about the presence of Rh antigen?

A +ve sign against our blood group type indicated the presence of Rh antigen in our blood. A –ve sign against the blood group type indicates its absence.

Q.5.
How many types of blood groups are there?

There are four known types of blood groups, namely A, B, O, and AB. The presence or absence of the Rh factor in the blood further divides each of these into +ve and –ve.

Q.6.
Which is the most commonly occurring blood group?

O +ve is the most commonly occurring blood group, with over 37% of the population having this blood group.

Q.7.
Name the blood group type that can donate only to its own group?

People who have one blood group can donate only to a person who has the same blood group, i.e., AB. However, they can receive blood from other people with blood group types.

Q.8.
Who was the first to discover blood types?

Karl Landsteiner, an Austrian physicist, is credited with discovering blood types in 1900 when he was working at the University of Vienna.

Q.9.
In which year was the Rh factor in blood discovered?

Karl Landsteiner, an Austrian physicist, discovered the Rh factor in 1935 when working with Alexander S. Wiener. The full form of the Rh factor is the “Rhesus Factor.”