PSY100H1 Chapter Notes - Chapter 3: Acetylcholine, Peripheral Nervous System
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PSY100H1 Full Course Notes
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Nts effects are not a property of the chemicals themselves, but rather a function of the receptors to which they bind! Same nt can be excitatory or inhibitory or produce radically different effects based on the properties of the receptor. Four categories of nt: acetylcholine, monoamines, amino acids, and peptides. Acetylcholine (ach) the neurotransmitter responsible for motor control at the junction between nerves and muscles, also involved in mental processes such as learning, memory, sleeping and dreaming binds with receptors on muscle cells, relax or contract. Ach excites skeletal muscles and inhibits heart muscles. Monoamines are involved in affect, arousal, and motivation. Monoamines: a group of nt synthesized from a single amino acid that are involved in a variety of psychological activities synthesized from single amino acids regulate states of arousal and affect (feelings) and to motivate behavior. Mao (monoamine oxidase)is enzyme that interrupts activity of all monoamines. Four types of monoamines neurotransmitters: epinephrine, norepinephrine, serotonin, dopamine.
