Nervous System Neuron Neuron Neurons Schwann cells and

Nervous System

Neuron

Neuron

Neurons

Schwann cells and the Oligodendroglia.

Myelin Sheath

A Baby’s Brain • https: //www. youtube. com/watch? v=MS 5 HUD VNb. Gs

Electrical Signal down axon Resting State • https: //www. youtube. com/watch? v=f. HRC 8 Sl. L c. H 0

Electrical Impulse Action Potential (1) • https: //www. youtube. com/watch? v=f. HRC 8 Sl. L c. H 0 Action Potential (2) • https: //www. youtube. com/watch? v=i. BDXOt_ u. HTQ

Types of Impulse Transmission Continuous Conduction

Types of Impulse Transmission Saltatory Conduction

Types of Impulse Transmission

Synapse Axon of transmitting neuron Axon terminal Action potential arrives Vesicles Synaptic cleft Receiving neuron Synapse

Neurotransmitters Axon of transmitting neuron Axon terminal Action potential arrives Vesicles Synaptic cleft Receiving neuron Transmitting neuron Vesicle fuses with plasma membrane Synaptic cleft Ion channels Receiving neuron Synapse

Neurotransmitters

Neural Networks Neural networks - formed when several neurons link together to form a pathway. – critical to the functioning of the body. different types of neural networks. examples: divergent circuit, a single neuron sends impulses to several other neurons. This allows information to be disseminated to many areas simultaneously to allow a coordination of activities. convergent circuit, several neurons send information to a single neuron. This type of circuit will allow information from a number of sources to be processed in one central location. reverberating circuit cycles the impulse back through the neural network. This continues to restimulate the neurons near the beginning of the neural network and keeps the information cycling through the network. This type of circuit is involved in short-term memory.