PSY100H1 Lecture Notes - Fmr1, Basal Ganglia, Intellectual Disability
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PSY100H1 Full Course Notes
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2 type of synapses : human brain contains about 100 billion neurons with each neuron forming an avg of. Receptor = ion channel: faster, metabotropic, neurotrans attaches to a g-protein receptor (g-proteins are active) and causes the g-protein to separate and attach to an ion channel, this causes the ion channel to open, 2-step process. Receptor is not the ion channel: slower, often deals with modulation bc it has the time delay in the synaptic cleft. Methods to deactivate neurotransmitters: diffusion (neurotrans can be diffused away, deactivation (broken down, reuptake (reabsorbed) Neural integration: excitatory membrane will be more positive, enough to hit threshold, thus ap fired. Inhibitory membrane will be more negative, therefore, farther away from threshold, no. Ap: however since there are many synapses for a given neuron, it is the net effect that really matters. 1 excitatory and 1 inhibitory of equal strengths = no effect.
