<span>Collin often experiences a "runner's high" during his daily three-mile run. this is most likely produced by endorphins.
Endorphins are related to a group of hormones which are secreted within the brain and the nervous system, it is like morphine chemicals which are produced. It is mostly produced when you exercise a lot, run high or stress etc.</span>
        
             
        
        
        
Answer: Male 
Explanation:
The pelvis is narrow in males, the pubis arch is 90 degrees in angle. It is broad in case of females to support pregnancy and child birth. Also the pubis arch is more than 90 degrees in angle. An occipital protuberance is a region that connects the head to the neck and it is generally larger in males than in female. In males the forehead is sloping in the cranium whereas that in females it is vertical and flat. 
Hence, the skeleton have the features that can be indicated towards the features of a male. 
 
        
             
        
        
        
Answer:
Explanation:
Gram positive stains are purple; gram negative are pink; cocci bacteria are spherical; the other is rod. There you go!
 
        
             
        
        
        
Answer:
i think that the correct answer would be A
Explanation:
hope this helps