Biology
Systolic and diastolic pressure in a healthy man is

85 mm and 55 mm
120 mm and 80 mm
201 mm and 110 mm
90 mm and 60 mm

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Biology
The kidneys are stimulated to produce renin

By a decrease in the blood pressure
When the specific gravity of urine rises above 1.10
When the peritubular capillaries are dilated
When the pH of the urine decreases

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