NROB60H3 Chapter Notes - Chapter 5: Endocytosis, Internal Resistance, Postsynaptic Potential
9 Dec 2020
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Synaptic transmission = process of information transfer at a synapse. Electrical synapses = simply electricity flowing from one neuron to another. Chemical synapse = chemical neurotransmitters transfer information from one neuron to another at the synapse. Discovered that innervation between the heart and the brain is chemically mediated. He isolated the vagus nerve connected to the heart of a frog. By stimulating electrically the nerve he saw a decrease in heartbeats. He then applied a solution to the heart and found the same results. = simple and direct transmission fo electrical current. Interconnect many non-neural cells such as epithelial cells, smooth and cardiac muscle cells, liver cells, some glandular cells, and glia. 2 connexon form from 2 different cells meet and form a gap junction channel (2nm) Allow small molecules and ions to pass. Ex: in invertebrates, such electrical synapses can be found between sensory and motor neurons which allow them to have escape reflexes extremely rapid.
