b. the burning of fossil fuels for energy and transportation
From the right atrium, blood will flow through the tricuspid valve into the right ventricle.
Chemical burns, eye safety, combustion
This can be true because africa has some the most oldest rocks in the world
Answer: phase 1
A cardiac action potential can be divided into phase 0-4. In phase 0, the sodium channel is opened and sodium will come into the cell which causes a rapid depolarization. In phase 1, the fast sodium channel is closed and K+ channel starts to be opened which makes a small repolarization.
