PSYCH 2010 Lecture Notes - Lecture 2: Alarm Clock, Endorphins, Membrane Potential
Document Summary
Neuron: basic unit of the nervous system, brain is composed of billions of neurons connected to each other, three different shapes, sensory neurons, inter-neurons. Only found in the spinal cord: motor neurons. Longer distance between cell body and axon. Neurons that connect muscles to the brain and spine (with messages and such: makeup of a neuron, looks kind of like a tree, the top is composed of dendrites. Used to receive messages from other cell: the cell body is located in the middle. The cell"s life-support system: axons are located towards the bottom. Passes messages away from the cell body to other neurons, muscles, or. The longest axon in the human body is from the spine to the big toe glands: neural impulse, myelin sheath. Covers the axon of some neurons and helps speed neural impulses: terminal branches of axon (terminal buttons) Form junctions with other cells: always travels from dendrites to terminal branches.
