<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>
I believe the answer is A.
hope this helps! C":
The answer is D. Sedimentary rock takes millions of years to form since sedimentary rock is formed by sand cementing together over long periods of time.
Answer: a. a cascade effect.
Explanation:
Hormones are the chemicals which are secreted by the glands and tissues of the body. These hormones are transferred into the circulatory system of the body where they are targeted to the tissues for regulating their actions. Some hormones regulate the secretion of other hormones in the body this is called as cascade effect. This cascading effect can be seen at the enzymatic level the activation of one enzyme causes the activation of other enzymes regulated by the hormonal control.
C.) Uracil is your answer.....