instruction:
Given a scientific question, generate a correct answer to it.
question:
Renal plasma flow equals the blood flow per minute times the what?
answer:
hematocrit

question:
To figure out the height of a wave you measure the distance between the crest and what?
answer:
trough

question:
Constriction and dilation allow the circulatory system to change the amount of blood flowing to which body parts?
answer:
organs