True i think but i could be wrong. hope you get it right!
        
             
        
        
        
Answer: The answer is the last option, Backflow of blood through a defective valve.
Explanation: Hypotension causes high blood pressure, and the other two options are not related to heart murmurs. A hear murmur is when the blood isn't flowing in the right direction causing the hear to beat irregularaly. 
 
        
             
        
        
        
Answer: 
3A
4B
1D
2J
7E
10I
I’m not sure of the rest give me a second. (I’ll add the rest in the comments section) But hope this helps! :)
        
             
        
        
        
<span>C02 regulation, the carbonic acid-bicarbonate buffer regulation, H+ regulation, and gas exchange. These regulations are all done through the circulatory, excretory, and respiratory systems. They are all part of one big function, that is homeostasis.</span>