<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>
A hypothesis is an idea or explanation that you then test through study and experimentation. A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. . Most hypotheses can be supported or refuted by experimentation or continued observation. Theory: A theory is more like a scientific law than a hypothesis. I hope this helps! Please give me stars to tell me how well I'm doing.
The process of active transport requires the most direct use of ATP.
I hope this helps.
Answer:
B.
Theories unify a broad range of observations and hypotheses.
