Answer:
Dendrites.
Explanation:
Dendrites is the part of neuron which is affected by the substance Y which leads to the decrease of action potential because dendrites is the part that  obtain information from other cells and carry that information to the cell body of neuron which transfer this information to the neighboring neurons. If the dendrites is damaged or adversely affected due to chemicals then it is unable to perform its function properly and its action potential will be greatly affected.
 
        
             
        
        
        
Protozoans that Move with Cilia. These protozoans are called Ciliates and have hundreds of tiny cilia which beat in unison to propel them through the water. ... In addition to locomotion, the Paramecium and other ciliates like the Stentor use cilia to sweep food down into their central channel or gullet.
 
        
             
        
        
        
Answer:Breaks down food molecules to release stored energy
Explanation:
 
        
                    
             
        
        
        
so, an example of something that might not be a substrate is the animal itself. 
explanation
substrate is the surface of where living animals, live. 
sorry if this doesnt help. 
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