The Human Nervous The Human Nervous System 35-1System 35-1

Name the three parts of a neuron.Name the three parts of a neuron.

Describe the way in which a nerve Describe the way in which a nerve impulse occurs.impulse occurs.

Can you label a neuron?Can you label a neuron?

• Cell body • Nucleus• Dendrites • Axon• Node of Ranvier

• Nucleus - Schwann cell• Schwann cell• Myelin sheath• Synaptic knob• Terminal Branches

A faster impulse – the action potential jumps from gap to gap.

Myelin Sheath

Three types of Nerve Cells

• Sensory Neurons

• Inter Neurons

• Motor Neurons

In a synapse vesicles release neurotransmitters which cause the next neuron to fire.

Art and text and presentation made by:Art and text and presentation made by:

Valerie Shiba Valerie Shiba and and

Jennifer LiJennifer Li

Hiya Mr. Nelson =P

Xerox 35-1

• 1 e• 2 i• 3 d• 4 n• 5 g• 6 l• 7 j• 8 a• 9 j• 10 m

• 11 b

• 12 a

• 13 h

• 14 k,b

• 15 c

• 16 k

• 17 m

• 18 f

• 19 l

Xerox 35-1 (Cont.)

• 20 dendrite• 21 b• 22 c• 23 d • 24 sensory• 25 negative

• 26 toward• 27 node• 28 neurotransmitter• 29 travel to the next

neuron• 30 the impulse would

not work• 31 increase the speed

of the neuron

Credits

• Initial art, text and presentation made by Initial art, text and presentation made by Valerie Shiba and Jennifer LiValerie Shiba and Jennifer Li