Unit 9 Lesson 2 Brain Power 课件-2022-2023学年高中英语北师大版（2019）选择性必修第三册

Unit 9 Human Biology Lesson 2 Brain Power Warming-up atom nerve billion cell organ ( ) 1 one thousand million ( ) 2 a part of the body that has a particular purpose, e.g. the heart ( ) 3 the smallest piece of something that can exist alone ( ) 4 a tiny pat of the body that helps carry messages to and from the brain ( ) 5 a unit of living matter billion organ atom nerve cell Work in pairs and match the words from the box with their definitions. Pre-listening ( ) 1 The brain consists of only white matter. ( ) 2 The brain weighs just over a kilo. ( ) 3 The brain contains about one billion cells. ( ) 4 The brain uses 10% of the body’s energy. ( ) 5 The brain sends messages in the same way as a computer works. ( ) 6 There are more possible connections in your brain than there are atoms in the universe. Before listening to a lecture about the brain, read the statements and predict whether they are true or not. Listen to the lecture and check your answers. Correct the false ones. ( ) 1 The brain consists of only white matter. ( ) 2 The brain weighs just over a kilo. ( ) 3 The brain contains about one billion cells. ( ) 4 The brain uses 10% of the body’s energy. ( ) 5 The brain sends messages in the same way as a computer works. ( ) 6 There are more possible connections in your brain than there are atoms in the universe. While-Listening grey and white matter F T F F T T one hundred billion cells 20% While-listening What matter does it consist of? Grey and white matter How much does it weigh? How much body’s energy does it use? How many cells does it contain? How are messages sent? The brain cells make up __________________, which are connected by ________________. The brain sends messages using ________________. What have we learnt about the brain in the last ten years? There are different areas in the brain, which are _______