There is no doubt that feelings play an important role in our life. But do you believe feelings have something to do with meals? The situation is known as being "hangry". That is to say, you may be angry more easily when you are hungry. It's not just a result of people's experiences. It is scientifically true.
Glucose（ 葡 萄 糖 ） is put into the body after you eat something. The brain needs glucose to work well. When you are low in glucose, your brain sends something to increase the glucose in the body. The brain even starts to feel like you are in a really terrible situation if you don't get enough glucose. And neuropeptide is also the chemical that manages anger.
One of the scientists in University of Sydney, says that we may also be able to thank our ancestors for our hunger. So even now most of us have enough food to eat, we still have the strong feeling towards needing food. This helps us keep the habit of having meals and we can keep energetic in our life.
A: It sounds strange, but it is true.
B: If you have a meal, then you may be happy very easily.
C: This makes it hard for you to control your emotions and feelings.
D: According to scientists, the low glucose levels in the blood can cause anger.
E: Long ago, when they didn't have much food, they tried to search for food as much as they could to get energy to keep alive.
F: Another problem of being low in glucose is that the brain will use neuropeptide（神经肽） to tell you it's time to eat.
