PSY-303 Lecture Notes - Lecture 4: Exocytosis, Reflex Arc, Tryptophan
Document Summary
The relationship among a sensory neuron, intrinsic neuron, and motor neuron. Spontaneous firing rate: the periodic production of action potentials despite synaptic input, epsps increase the number of action potentials above the spontaneous firing rate, ipsps decrease the number of action potentials below the spontaneous firing rate. Types of neurotransmitters, part 2: neurons synthesize neurotransmitters and other chemicals from substances provided by the diet, acetylcholine synthesized from choline found in milk, eggs, and nuts, tryptophan serves as a precursor for serotonin. Activating receptors of the postsynaptic cell: the effect of a neurotransmitter depends on its receptor on the postsynaptic cell, transmitter-gated or ligand-gated channels are controlled by a neurotransmitter. Ionotropic effects: occurs when a neurotransmitter attaches to receptors and immediately opens ion channels, most effects, occur very quickly (sometimes less than a millisecond after attaching) and are very short lasting, rely on glutamate or gaba.
