L2 Listening：Exercise and the Brain

What is the main topic of the podcast?

• The benefits of exercise for the body.

• The effects of exercise on the brain.

• How to improve memory through diet.

• The process of brain surgery.

According to the podcast, what positive effect does exercise have on the brain?

• It makes the brain smaller.

• It reduces the production of chemicals in the brain.

• It makes you smarter.

• It slows down electrical signals in the brain.

When a person learns to ride a bike, what happens in the brain?

• The brain stops producing BDNF.

• New connections form between neurons.

• Electrical signals stop moving.

• The brain's structure remains unchanged.

What are the signals in the brain composed of?

• Only electricity.

• Only chemicals.

• Both electricity and chemicals.

• Neither electricity nor chemicals.

What is BDNF?

• A chemical that makes exercise difficult.

• A chemical produced by the body during sleep.

• A chemical important for memory and learning.

• A chemical that controls blood flow in the brain.

Where is BDNF made?

• In the muscles.

• Only in the brain.

• In the heart.

• In the liver.

How often should one exercise to produce BDNF?

• Once a month.

• Every day.

• Several times a week.

• Once a year.

Why does Aaron Fleming want to keep exercising?

• Because he likes the feeling of being tired.

• Because he wants to keep his brain and body fit.

• Because his friends exercise.

• Because he wants to become a professional athlete.

What is the role of neurons in the brain?

• They produce BDNF.

• They are like wires, carrying messages in the brain and between the brain and the body.

• They control the heart rate during exercise.

• They change the taste of food.

What do scientists recently learn about exercise?

• It makes people more forgetful.

• It makes people happier but not smarter.

• It makes people smarter.

• It has no effect on the brain.