An action potential involves the transfer SODIUM and POTASSIUM ions across an axon's membrane.
During depolarization, when the ion channels open, they allow the influx of sodium ions into the cell, thus changing the electro-chemical gradient of the cell, in order to counter balance this, potassium ions will be allowed to flow out of the cell.<span />
        
             
        
        
        
We need answers to choose from haha
        
             
        
        
        
Answer: There are two main types of UAVs used for remote sensing applications: fixed-wing and rotary wing.
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Hope this helps :)
 
        
             
        
        
        
i beleive that is the respiratory system but ill double check in  a m inute
alright heres all your answers for that test question 1 true
question 2 oxygen question 3 carbon dioxide question 4 true question 5 alvoei question 6 diaphram question 7 respitory system  the last 3 are all true i hope i helped