There is evidence that the usual variety of high blood pressure is, in part, a family dise
By mating in successive generations only those animals that failed to develop hypertension from salt ingestion, a resistant strain (the" R" strain) has been evolved in which consumption of large quantities of salt fails to influence the blood pressure significantly. In contrast, by mating only animals that quickly develop hypertension from salt, a sensitive strain ("S" strain) has also been developed.
The availability of these two strains permits investigations not heretofore possible. They provide a plausible laboratory model on which to investigate some clinical aspects of the human proto - types of hypertension. More important, there might be the possibility of developing methods by which genetic susceptibility of human beings to high blood pressure can be defined without waiting for its appearance.
Which statement relates the main idea of this passage?
A.When salt is added to their diets, rats and men react in much the same way.
B.The near future will see a cure for high blood pressure.
C.Modem research has shown that high blood pressure is a result of salt in the diet.
D.A tendency toward high blood pressure may be a hereditary factor.