Brain Biology

1
Brain Biology
2
The nervous system

• Central nervous system
• Brain and spinal cord
• Peripheral nervous system
• All other nerves

3
The Inside of a Brain
4
Parts of the brain
5
Neuron facts.

• There are more nerve cells in the human brain
  than there are stars in the Milky Way.

• The longest neuron is about 15 feet. It is
  found in a
• giraffe.

• The speed of a signal through a neuron can
• be from 1.2 miles/hour to 250 miles/hour.

6
The Neuron

• The brain is made of cells called neurons.
• Neurons dendrite, cell body, axon

7
Neurons and Learning

• Neurons can not replace themselves. Once the
  cell body dies the cell dies.
• Neurons get smarter by growing dendrites and
  axons.
• Learning new information causes dendrites and
  axons to grow.

8
Neurons talk through neurotransmitters.
9
The Synapse
(Dendrite)
10
Your Brain and Drugs.