In an unusual population of humans (we’ll call them
pressurites), blood pressures tend to be much higher than normal,
with systolic pressures averaging about 160 mm Hg, and diastolic
pressures about 110 mm Hg. Probably because of this, pressurites
have a high incidence of stroke. Your job is to begin to figure out
what might be wrong.
You discover that heart rates, stroke volumes and heart
size are all normal. List two possible causes of high blood
pressure that these...