BIO 102 Lecture Notes - Lecture 11: Excitatory Postsynaptic Potential, Inhibitory Postsynaptic Potential, Postsynaptic Potential
Document Summary
Neurons aka nerve cells: receive, process and transmit information. Glia: assist neural function by providing nutrients, regulating composition of interstitial fluid, modulating communication between neurons and speeding up electrical signals. Dendrites: branched tendrils protruding from cell body. Some types respond to neurotransmitters (chemicals released by neurons) Cell body: processes information and produces an electrical signal. Cell body adds up the electrical signals from dendrites and if they are positive, action potential is created. Action potential: a large, rapid electrical signal from a neuron when it is positive. Axon: extends outward from the cell body. Conducts action potentials -place of contact for other cells. Dopamine-located in the midbrain-major function; important in emotion, rewards and the control of movement. Serotonin-located in midbrain, pons, and medulla- major function; influences mood and sleep. Endorphins-many areas of the brain and spinal cord-major function: influence mood, reduce pain sensations. Synapse: site of neuron communication made up of:
