Rh fector was discovered by
A.landsteiner and weiner
B.william harvey
C.malpighi
D.none of these
Delta cells secrete-
A.glucagon
B.insulin
C.somatotastin
D.sarotonin
Vasodilation is caused by;
1. Parasympathetic stimulation
2. Sympathetic blockade
3. Localized hypoxia
4. Anaphylactic shock
5. Stimulation of chemoreceptors