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Neurons. The human brain Thought experiment Scientist have discovered that the brain has about 83 billion neurons. How do they know?

Published byMervin Garrison Modified over 8 years ago

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Presentation on theme: "Neurons. The human brain Thought experiment Scientist have discovered that the brain has about 83 billion neurons. How do they know?"— Presentation transcript:

1 Neurons

2

3 The human brain

4

5

6

7

8 Thought experiment Scientist have discovered that the brain has about 83 billion neurons. How do they know?

9 General Morphology of a Neuron Axon Hillock Nodes of Ranvier

10 Biology of a Neuron

11 Neurons are Diverse

12 Neurons Can be Classified by Morphology

13 The Axon is a Long Process Moving a protein from one end of a (6ft) long sensory neuron to the other would take weeks. For faster communication the neuron uses the electronic potential of the cell membrane. This electronic transfer allows information to travel 6 feet in about 2/100ths of a second.

14 Cell membrane

15 Ion Channels Voltage gatedLigand gatedLeak

16 Action Potential Na + K+K+ Resting Threshold

17 Thought experiment How can a neuron encode information? How can one neuron communicate to an entire brain?

18 Myelin Sheath

19 Myelin Sheath Increases the Speed of Action Potential Propagation Unmyelinated Myelinated

20 Synapse Presynaptic terminal Synaptic vesicle Mitochondria Synaptic Cleft Postsynaptic bouton Neurotransmitter receptor

21 Post synaptic potentials

22 Neurons form neural networks

23 Neuroglia

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