MARKET 1 Lecture Notes - Lecture 7: Tetanospasmin, Mptp, Reward System
Document Summary
Introduction to psychology 1: cognitive and biological psychology. If cells = depolarised (made less -, more +), voltage gated na+ channels open: na+ rushes in, as it is trying to neutralise the big a- and down its concentration gradient, na+ much more concentrated outside cell. The synapse: when the action potential reaches the presynaptic terminal, a neurotransmitter is released into the junction between the neurons (synapse), the neurotransmitter can have an excitatory or inhibitory effect. Synapses that cause movement: most synapses occur between neurons. These result in a neuron becoming excited or inhibited. However, there are specialised synapses that form between neurons and muscles (neuro-muscular junction). These cause muscles to contract and allow us to move: the axons from neurons that activate muscles located in the spinal cord. Sclerosis) is a disease that affects these neurons. The disease gradually restricts movement and eventually results in death. Ionotropic neurotransmitter receptors: neurotransmitter receptors are proteins that are found on dendrites (post-synaptic membrane).
