The answer is: 13) B 14) C 15) A
Endorphins reducing stress levels
Answer:
C . Ritalin
Explanation:
Ritalin with other types of stimulants causes overactive eye movement. Ritalin belongs to a group of stimulants called Methylphenidate not only this but others such as cocaine,nicotine etc
The cardiovascular system is made up of what two systems:
a) Circulatory system and respiratory system
