Explain why muscles contract weekly or not at all when excessive levels of lactic acid and ADP have accumulated in the muscle and an excessive amount of K+ is lost in the muscle fibers

b is the best answer for this question.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

i believe the answer would be b. hope it : )

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .