Answer:
It controls opening and closing movements of the stomata, but that isn't one of the answer choices.
Explanation:
Serotonin and n<span>orepinephrine.
Serotonin decreases appetite by activating </span>5-HT2C receptors<span> on dopamine-producing cells which will cause dopamine release to stop. Dopamine is responsible for the increase of appetite, therefore, serotonin decreases appetite.
Norepinephrine by increasing the production of glucose it also causes the body to feel satiety and, therefore, decreases the appetite.</span>
Answer:
The answer is- A). Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere.
Explanation:
I really don't have an explanation. Except that I love science and I actually pay attention in my classes.