Answer:inhibit pacemaker potential 
Explanation:
 
        
             
        
        
        
Answer:
1. Displaced, Complete, Open
Explanation:
Displaced fracture - in this type of bone fracture the bone breaks into two or more parts, moves and thus the parts become misaligned.
Complete fracture - in this type of fracture the parts of bone become completely separated from rest one.
Open fracture - it is compound fracture where skin breaks and part of the broken bone protrudes out of the skin.
 
        
             
        
        
        
Answer:
a discovery by a human being
Explanation:
The correct answer would be a discovery by human being.
Penicillin existed in nature and was only discovered, albeit accidentally, by Alexander Fleming. 
It is different from<u> technological innovation because the latter requires the synthesis of products that are not in existence already or improvement on a product that has been created before</u>.
Discovery is also different from advancement in technology. <u>The latter refers to the process of inventing, innovating, and spreading technological processes in society.</u>
Discoveries are usually natural and are not in any way an invention. However, advancement in technology can aid discoveries.