The answer to this question would be: parasympathetic division
Parasympathetic nervous is part of the autonomous nervous system. In the autonomous nervous system, the sympathetic system is used when you enter the "fight or flight" mode. In this case, the body will be prepared to be able to take a decision as quickly as possible in a strenuous state. The nervous also cause an increase in the heart and breathing rate to increase body capability.
Parasympathetic is the opposite of it which was activated to calm the body so it can maintain the normal body function.
        
             
        
        
        
The reading of the blood pH value of 6.4 indicates a health issue because of the pH value. It is because the concentrations of H+ ions in the body becomes 10 times more than the usual level in the body.  
The pH of the blood becomes less than 7.35 due to enhanced production of hydrogen ions by the body or the incapability of the body to produce bicarbonate ions in the kidney, the condition is known as metabolic acidosis that eventually results in acidemia.  
 
        
             
        
        
        
One negative side effect of with anaerobic synthesis of energy is that a by product of glycolysis is lactic acid
lactic acid cause muscle fatigue and post exercise  muscle soreness. when you exercise the body uses oxygen to break down glucose for energy. when one do intensive exercise, oxygen may not be enough therefore lactic acid is produced.
 
        
                    
             
        
        
        
Answer:
A. their nephron loop is closely wrapped with vasa recta
Explanation: