Answer:
Binding of   <u>ACh (acetylcholine)  </u>  to receptors (ligand-gated) on the sarcolemma at the neuromuscular junction is vital for depolarization of the muscle fiber.
Explanation:
It allows acetylcholine to be released into this synapse when an action potential hits a neuromuscular junction. Acetylcholine attaches to the nicotinic receptors localized on the post-synaptic membrane of the muscle fibre's motor end plate, a specialized region.
Hence , the answer is  <u>ACh (acetylcholine) .</u>
 
        
             
        
        
        
It’s C. I just recall hearing my teacher say that... sorry I have no explanation
        
                    
             
        
        
        
Thank you for posting your question here at brainly. Below are choices that I manage to check from other sources:
A. A weed is uprooted from the soil. 
B. Oxygen is removed from the water in a fish’s bowl. 
C. A cactus is moved from a sunny windowsill to a dark room. 
D. The water bowl is removed from a hamster’s cage.
The answer is C. 
 
        
        
        
The release of absorption is CHEMICAL CHANGE. A chemical change is a type of change in which a new product is produced. Heat is either released or absorbed during a chemical change, and this heat change indicates the bonds have been broken and rearrange. Do the answer is C. CHEMICAL CHANGE.
MARK ME BRAINIEST
 
        
                    
             
        
        
        
When taking a tissue culture for thoes who have cancer it allowes for more of a trial error method. When a tissue culture is collected the scientist/doctors get to test procedures on it to see what teatment works best for you. With out them there would be many people taking medicins that dont even help them with their condition; and in few cases could make it worse. Just saying tissue culturs' are a huge advancement in technology, and science.