Answer:
Insulin
Explanation:
Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion! Insulin is normally secreted by the beta cells (a type of islet cell) of the pancreas.
Katie should watch what she eats, this is because a lot of teenagers eat a large amount of junk food an average per day. Katie should also do a lot of exercise so that her body grows healthy and strong! Katie should choose vegetables and fruits and food filled with nutrients for the body, Katie should also not listen to negative peer pressure but use positive peer pressure to her advantage.
Cardiovascular system is often compared to a city.
