1. Some scientists say brain has ............. billion neurons.

10

20

25

30

2. brain is distinguished from the rest of the brains of other organisms with the layer of ............ .

Testosterone

NewCortex

Adrenaline

Estrogen

3. the layer of NewCortex, makes up ............. percent of the brain mass.

50

20

30

40

4. brain is responsible for remembering, , questioning, and

intelligence

understanding

remembering

all

5. The cerebellum is the smallest part of the brain, located in the ............... of the brain.

lower

higher

medium

first

6. which one helps to activate in life?

Eat healthy foods such as corn oil and olive

Drink plenty of water,

Eat plenty of vegetables and fruits

all