Yes it does put carbon dioxide in the atmosphere 
        
                    
             
        
        
        
I think it is because it's easier to "control". Like the books usually said that the nucleus is the control center of the nucleus, so if the nucleus located at the center or near center of the cell. So like easy contact, easy control, easy communication etc.
 
        
             
        
        
        
Answer:
a) Emission observed is due to emission of synaptic vessels
b) Yes 
Explanation:
<u>a) Proposing an explanation</u>
The emission observed ( the synaptic regions of the neurons remaining fluorescent ) is due to the emission on the synaptic vessels given that FM dyes have lipid-sensitive emission which can be loaded into a recycled synaptic vesicle
<u>b) </u>
The synaptic regions will lose fluorescence when you continue to wash with excess medium, also the more action potentials triggered the more observed emission. hence the increase in the loss of fluorescence is due to the fact that the emissions are not permanent