The Cardiac Muscle contracts about 70 times per minute
The part that makes you yawn is the reticular
You could probably buy a tester <span />
Electricity is the manifestation of traveling currents. These currents however are unable to move unless one were to complete a "circuit" (Word you are looking for). If the circuit is not completed electricity doesn't travel.
Answer:
So you have to solve for the point when y=0
Hence: C
