<span>The answer is endonorphins. They are opotid peptide hrmones and are poduced endogenously. Endonorphons inhibit transmissions of the signals related to pain, and are also use in depersonalization treatments. They are screted in brain and nervous system and cause an analgesic effect in the body.</span>
        
                    
             
        
        
        
Answer:
Explanation:
Health education is a field of study that focuses on the role of health in population growth and development. It includes physical, mental, and spiritual emotional, intellectual health.
Its aim is to address the issue of illness, death, malnutrition, and rising health care costs. People who study health education are well aware of the fact of population growth and depletion of resources.
Health education suggests that the increase in population growth has resulted in the overuse of resources around the world and this impacts the availability of groundwater and changes in the climate of countries.
Air pollution and rising food consumption patterns around the world show generation of wastes and contamination of the environment.
Learn more about the people who get health education are aware of problems of population growth and environment degradation.
 
 
        
             
        
        
        
1) 
Overload PrincipleTo make improvements in your fitness you need to overload your body. You need to stress or challenge the bodily system (aerobic/musculoskeletal) beyond what it is used to.
2) Specificity Principle
Your exercise program must be specifically related to your training goals.
 3)
 Individuality Principle
"Everyone is different, which means everyone is special) 
4) Reversibility Principle
Not being as good as something as you used to.
 
        
             
        
        
        
D. it is safer because no radiation is used