PSYB65H3 Chapter Notes - Chapter 5: Excitatory Synapse, Inhibitory Postsynaptic Potential, Chemical Synapse
Document Summary
Acetylcholine (ach): first neurotransmitter discovered in the pns and cns; activates skeletal muscles in the sns; may either excite or inhibit internal organs in the ans. Epinephrine (ep, or adrenaline): chemical messenger that acts as a neurotransmitter in the cns and as a hormone to mobilize the body for fight or flight during times of stress. Norepinephrine (ne, or noradrenaline): neurotransmitter that accelerates heart rate in mammals; found in the brain and in the sympathetic division of the ans. Neurotransmitter: chemical with an excitatory or inhibitory effect when released by a neuron onto a target. Parkinson disease: disorder of the motor system correlated with a loss of dopamine from the substantia nigra and characterized by tremors, muscular rigidity, and a reduction in voluntary movement. Dopamine (da): amine neurotransmitter involved in coordinating movement, attention, learning, and in reinforcing behaviors. Neurotransmitters are derived in two general ways:
