What causes lactic acid to build up in muscle cells? A. The cells receive excess oxygen than the body takes in.
B.cells use oxygen move quickly than the bloodstream can supply it.
C. the cells do not receive enough glucose from the bloodstream.
D. the cells are resting and not active.

B.cells use oxygen move quickly than the bloodstream can supply it.

Explanation:

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Using Biochemical Energy

One way cells use the energy provided by ATP is to carry out active transport. Many cell membranes contain a sodium-potassium pump, a membrane protein that pumps sodium ions (Na+) out of the cell and potassium ions (K+) into it.

Explanation: