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Department
Anthropology
Course
ANTH 2100
Professor
All Professors
Semester
Fall

Description
BIOL 1F25 BIOLOGY A HUMAN PERSPECTIVEJanuary 17 2013Dr N VespriniSynaptic Transmissionchemical actions at synapses were proposed in the late 1800s1921 Otto Loewifirst showed experimentally using the vagus nerve of the heartstimulated the vagus nerve of one heart decreasing the heart ratetransferred fluid surrounding that heart to another heart which also decreased the heart rateno electricity in water therefore electricity not directly responsible for the heart contractionschemical released into the water ACh released from vagus nerve slows the heartaction potential in presynaptic cell releases chemical messagesthe message can either excite or inhibit post synaptic cellsdependent on the transmitter released the receptor presentsynapses can be excitatory or inhibitorysee Figure 27B page 115 of TEXTExcitat
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