I would agree with your answer of C. As there would need to be calcium to start with and they seem to come from the sarcoplasmic reticulum
        
                    
             
        
        
        
Answer:
Option B
Explanation:
B. The cell will grow uncontrollably and continue to divide as long as it has food.
Cell growth is theeoretically stimulated by the binding of growth factors to their receptors using signaling pathways. 
These pathways are regulated by proteins which are encoded for in the genes. 
The gene that controls the regulation of these pathway when mutated produce malfunctioning signaling protein thus not allow for regulations of the cell cycle causing uncontrollable cell division. These mutated genes are called oncogenes.
 
        
             
        
        
        
Answer by Mimiwhatsup: C. Convergent boundary
Why is this right: Convergent boundaries but also known as 'destructive' is a(n) region of active deformation( an act of deforming, or at the state of being deformed) which is where two or more tectonic plates or fragments of the lithosphere are near end of their life cycle.
 
        
                    
             
        
        
        
Answer:
Excretion is a process in which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys, and skin.
Carbon dioxide 
The liver regulates most chemical levels in the blood and excretes a product called bile. This helps carry away waste products from the liver. All the blood leaving the stomach and intestines passes through the liver. The liver processes this blood and breaks down, balances, and creates the nutrients and also metabolizes drugs into forms that are easier to use for the rest of the body or that are nontoxic.
 p/s: pls vote if u find it's useful :3 thank youuu
 
        
             
        
        
        
If the Na+ voltage-gated channels in a muscle cell open, the Na (sodium) ions rush inside the muscle cell and makes the cell more positive as Na ions carry positive charge on it. Due to the entry of positively charged ions inside the cell, the cell becomes less negative and more positive. This is called depolarization of cell.