What are antigens?
Harmful disease-causing microorganisms
Any foreign substance that induces an immune response
Antibodies produced by the immune system in response to a pathogen
What is the main function of erythrocytes (red blood cells)?
To deliver oxygen to cells
To deliver carbon dioxide to tissues
Both are correct
If a person inherits the A allele from his mother, and the B allele from his father, what will his blood type be?
Type B
Type A
None of them
Why are people with Type O blood considered universal donors?
Their erythrocytes have both the A and the B antigens, so their body doesn't make any antibodies
Their erythrocytes have neither the A nor the B antigen, so there are no antigens to induce an immune response in the recipient
Their erythrocytes have neither the A nor the B antigen, so their body doesn't make any antibodies
What is Rh factor?
Rheumatoid factor, which indicates the probability of suffering Rheumatoid arthritis
Rhesus factor, another type of antigen on erythrocytes
Red hemoglobin factor, indicating the presence of red blood cells
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