PSYB65H3 Chapter Notes - Chapter 5: Myocyte, Mesolimbic Pathway, Habituation
Document Summary
Ch 5: how do neurons use electrochemical signals to. Acetylcholine acts to inhibit heartbeat and to slow it down. Ach also activates skeletal muscles in the somatic nervous system, by exciting or inhibiting internal organs in the autonomic system. Ach is the first neurotransmitter discovered in the peripheral and central nervous system; activates skeletal muscles in the somatic nervous system and either excites or inhibits internal organs in the autonomic system. Epinephrine (adrenaline): chemical messenger that acts as a hormone to mobilize the body for fight or flight during times of stress, and a neurotransmitter in the cns, produced by adrenal glands (atop the kidneys) Norepinephrine (noradrenaline): neurotransmitter found in the brain and in the sympathetic division of the ans; accelerates heart rate in mammals. Neurotransmitter: chemical released by a neuron onto a target with an excitatory or inhibitory effect. Symptoms appear when there are low levels of dopamine (less than 10% of normal in basal ganglia)
