it is c
Explanation:
cause it's just c and it will always be c cause I did this before and it was easy so the letter is c and u can correct me if I'm wrong but my mind will always say it's c cause c is my lucky letter so it is c
Answer:
b to a
Explanation:
since cells in membranes move from high to low concentration (diffusion). b has more molecules, so it will go into a.
A system is contained by its boundary; therefore, the size of a system is limited by its boundary.
Lactic acid buildup when you’re exercising causes a build up of oxygen. Your body cannot break down glucose in the blood. So, your heart beat increases because there is more oxygen than normal needing to be pumped throughout the body.
In short terms: because your heart needs to pump more oxygen, it is pumping faster causing a faster heart rate.
