Odpowiedz na pytania. (najlepiej jednym zdaniem) 1. Why does the brain needs glucose? 2. What can you do to train your brain? 3. What effect can tiredness have on the brain?

1. The brain needs glucose to fuel its activities. 2. To train your brain you can include solving some basic problems like basic arithmetic, crosswords, sudoku or playing chess in your day.  3.  Tiredness can effect your thinking, sleeping, work performance, mood, and safety.