PSYC 2240 Chapter Notes - Chapter 3: Cyclic Adenosine Monophosphate, Nicotinic Acetylcholine Receptor, Second Messenger System

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Ramon cakaj demonstrated that there is a narrow gap separation the neurons. Charles sherrington physically demonstrated that communication between one neuron to the next differs from communication along a single axon and termed the term synapse. Reflex arc: circuit from sensory neuron to muscle response. Speed of a reflex and delayed transmission at the synapse: Speed of conduction through the reflex arc varied but was never more than 15 m/s. Delay occurs when one euro communicates with another. Temporal summation: repeated stimuli within a brief time have cumulative effect. Postsynaptic neuron: neuron that received the transmission. Subthreshold excitation in postsynaptic neuron decays over time but it can be combined with second excitation. Excitatory postsynaptic potential (epsp): graded depolarization that results from a flow of na ions into the neuron. If threshold is not reached, depolarization decays quickly. Synaptic inputs from separate locations combine their effects on a neuron.

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