Answer:
it shocks the hearts muscles jolting the heart into working again.
Explanation:
 
        
                    
             
        
        
        
When that bacteria changes in some way that reduces or eliminates the use of the drug.
 
        
             
        
        
        
Inhibitory neurotransmitters such as glycine and GABA make a postsynaptic cell harder to depolarize by allowing "an influx of Cl-".
<u>Explanation:</u>
The neurotransmitters which have inhibitory influence on the neuron are termed as "Inhibitory neurotransmitters". The major inhibitory neurotransmitters involve serotonin and gamma-aminobutyric acid (GABA) in the brain and brain stem (spinal cord) respectively.
GABA uptake is temperature and ion-dependent as require both  and
 and  . Even glycine transporters are also members of the large family of
. Even glycine transporters are also members of the large family of  dependent neurotransmitter transporters. Both of them with the GABA transporters share approximately 50% sequence identity.
 dependent neurotransmitter transporters. Both of them with the GABA transporters share approximately 50% sequence identity.
 
        
             
        
        
        
Answer:
3- Nervous and Digestive
Explanation:
1: The nervous system works to alert the young birds of danger as the nervous system consists of different types of neurons and receptors, which enable the bird to feel pain or dainger. For example, if a predator was nearby and attacked the bird, the nervous system would help trigger a fight-or-flight response in the bird to help it survive.
2: The nervous system helps to produce vomit - vomit comes from the stomach, which is part of the digestive system, and bile and various other substances from the stomach will be pushed back up the oesophagus as the bird vomits, allowing it to protect itself. 
Hope this helps, let me know if you have any questions! :)