Blood pressure is determined by two factors: 1) The amount of blood pumped by the left ventricle of the heart into the arteries, and 2) the resistance to the flow of blood caused by the walls of the arterioles (smaller arteries).
PremierOpinion. PremierOpinion (or Premier Opinion) is adware which gets into computers by piggybacking corrupt screensavers downloaded onto a computer system. Premier Opinion is one of the first badware programs that affects both Macs and PCs. The removal of PremierOpinion has proven to be rather difficult but experts say using a reliable antispyware program should do the trick.
The protonâproton chain reaction dominates in stars the size of the Sun or smaller. The protonâproton chain reaction is one of two nuclear fusion reactions, along with the CNO cycle, by which stars convert hydrogen to helium and which dominates in stars the size of the Sun or smaller.he theory that protonâproton reactions are the basic principle by which the Sun and other stars burn was advocated by Arthur Stanley Eddington in the 1920s. At the time, the temperature of the Sun was considered too low to overcome the Coulomb barrier.