Respuesta :
Answer:
the answer is D. It decreases because the blood uses up all the oxygen before it gets to the cell.
When blood comes in contact with the cell, it decreases because the blood uses up all the oxygen before it gets to the cell.
WHAT IS CELLULAR RESPIRATION?
Cellular respiration is the process by which living organisms break down food molecules in their cells to produce energy.
The process of cellular respiration makes use of oxygen in an aerobic environment.
This means that when blood comes in contact with the cell, it decreases because the blood uses up all the oxygen before it gets to the cell.
Learn more about respiration at: https://brainly.com/question/18477177