BIOLOGY 173 Lecture Notes - Lecture 35: Butyric Acid, Autonomic Nervous System, Biogenic Substance
7 Dec 2016
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They are a diverse group chemically that includes biogenic amines, amino acids, neuropeptides, dissolved gases, purines, and lipids. Excitatory neurotransmitters that cause a depolarization in postsynaptic neuron: depolarization called excitatory postsynaptic potential (epsp, epsp does not reach threshold or fire an action potential; transient (cid:894)doesn"t last(cid:895) Inhibitory cause a hyperpolarization in postsynaptic neuron (hyperpolarization becomes more negative: hyperpolarization called inhibitory postsynaptic potential (ipsp) Ipsp further from threshold, further from firing an action potential; transient. Gama amino butyric acid gaba decreases anxiety. Glycine: the exact effect of particular neurotransmitter depends on the receptor of the postsynaptic neuron not the neurotransmitter. A single postsynaptic neuron usually has more than one presynaptic neuron. Neurons are organized into neural pools functional group of neurons 5 different patterns. Diverging: presynaptic neuron branches, many postsynaptic, ex. Converging: many presynaptic, one postsynaptic, ex. Parallel: one presynaptic, initially diverging, many postsynaptic, parallel, ex. Reverberating: presynaptic, postsynaptic circles back to the presynaptic and transmits on, ex.
