PSY 201 Lecture Notes - Lecture 4: Membrane Potential, Psy
23 Jan 2017
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January 23, 2017: main building block = the neuron, 1 billion to 1 trillion cells, glia = helper cells , blood cells nervous system requires a lot of glucose, 40% of blood pumped goes to brain. Neurons: are the basic units of the nervous system, receive, integrate, and transmit info, operate through electrical signals, communicate with other neurons via chemical signals, structure: Cell body (soma) keeps cell alive, integrates signals. Synapse at the end of the neuron, where the next neuron makes contact. I. e. re exes: a built in response that executes automatically. Collaboration of central and peripheral nervous systems: neurons communicate via membrane potential, or a charge across membranes. Sodium potassium pump: pumps 3 na+ out of the neuron for every 2 k+ into the neuron: action potential the rapid reversal of membrane potential, synaptic vesicles. Lled with neurotransmitters (i. e. glutamate, gaba, dopamine) Neurotransmitters: neurotransmitters are the chemical substances released by neurons, things ending neurotransmitter in uence:
