PSYC 1010 Lecture Notes - Lecture 4: Amnesia, Parasympathetic Nervous System, Neuroglia

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Heather Jenkins

Document Summary

Neurons: the conducting cells of the nervous system. Surround neurons and hold them in place. Absorbs toxins and waste materials from the neurons. Slide 3: meylin sheath fatty insulated layer derived from glial cells insulates axon from electrical activity. Acts to increase rate of transmission of signals. Gaps (nodes of ranvier) exist in myelin sheath along axon. A neuron impulse that travels down an axon like a wave the neuron receives signals from other neurons; some are telling it to fire and some telling it not to fire. Slide 5: the synapse is a junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. Are chemicals used to send siganlas across the synaptic gap. Reuptake: after neurotransmitters stimulate the receptors on the receiving neuron, the chemicals are taken back up to the sending neuron to be used again.