blood groups Flashcards
1
Q
what are ABO antigens made of
A
polysaccharides
2
Q
what is A blood group antigen
A
GalNac
3
Q
what is B group antigen
A
Gal
4
Q
does DNA encode for ABO antigens
A
No, it makes the enzyme eg galnac transferase which can add the polysaccharide to the chain
5
Q
are ABO antibodies innate
A
yes. automatically made by immune system from 6mo in utero
6
Q
are RhD antiboddies innate
A
NO. only by by D- if comes into contact with D+
7
Q
D+ is recessive or dominat
A
D+ is dominant
8
Q
who makes D+ antibodies
A
D- mother with D+ baby
9
Q
what prevents anti D rejection events nowadays
A
Anti-D injection (RHophylac) at 28 wks
10
Q
blood sample labeled with sticky label?
A
no. has to be written by hand
11
Q
how many blood samples from a pt to ensure correct blood grp
A
2
12
Q
is Rh Rhesus
A
NO!
13
Q
what does the + of eg A+ refer to
A
D+ Rh group
14
Q
A
