Answer:
Without ADH the kidneys will not save as much water and you produce large volumes of dilute urine. The level of water in your blood falls back to the typical level. 
Explanation:
As the level of water in the blood falls, negative feedback makes sure that the amount of ADH will rise.
 
        
             
        
        
        
Answer:
True.
Explanation:
Enkephalins and endorphins are endogenous peptides while morphine is an exogenous peptide.
Enkephalins and endorphins are powerful analgesics 18 to 500 times more than morphine. Hence, morphine is less analgesic than enkephalins and endorphins.
Enkephalins and endorphins act on the  mu, kappa , delta receptors and morphine also acts on the same receptors. All of them has same effects on the body.
Hence, Enkephalins and endorphins are peptides that act like morphine.
 
        
                    
             
        
        
        
The answer is A. It twirls like a helix and has 2 strands