PSYA01H3 Chapter Notes - Chapter 3: Autonomic Nervous System, Endocrine System, Monoamine Neurotransmitter
Document Summary
All-or-none principle - individual nerve cells fire at the same strength every time an action potential occurs. Synaptic cleft distance between the axon terminal and the synaptic cleft. Glutamate the most common excitatory neurotransmitter in the brains of vertebrates. Excites the nervous sytem, memory and autonomic nervous system reactions. Gaba the primary inhibitory transmitter of the nervous system, meaning that is prevents neurons from generating action potentials. Inhibits brain activity,lowers arousel, anxiety, and excitation, facilitates sleep. Acetylcholine one of the most widespread neurotransmitters with in the boody, found at the junctions between nerve cells and skeletal muscles. Dopamine monoamine neurotrsnmitter involved is variety of functions: Contorl movement, reward-seeking behaviour, cognition and attention. Norepinephrine monoamine synthesized from dopamine molecules that is involved in regulating stress responses, including: Memory, attention to new or important stimuli, regulation of sleep and mood. Agonists drugs that enhance or mimic the effects of neurotransmitter\s action.
