NEUR 2200 Lecture Notes - Lecture 7: Otto Loewi, Neurotransmitter Receptor, Autonomic Nervous System
8 Apr 2016
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Chapter 5 begins at 39 minutes of lecture 6. Nt signal between neuron post synapic is slower than an acion potenial if un myelinated how quickly ion channels reset to resing. Simulated the vagal nerve (cranial nerve 10) electrically he simulated it and one side which decreased the nerve. Reasoned the beaing of the heart is due to chemical signals. Demonstrated that the neurotransmiter acetylcholine (ach) slows heart rate. The irst neurotransmiter discovered in the pns and cns; acivates skeletal muscles in the somaic nervous system and may excite or inhibit internal organs in the autonomic nervous system. Also released from the motor neuron terminal which is what leads to muscle contracion in the heart it leads to a decrease in heart rate. Chemical messenger that acts as a hormone to mobilize the body for ight or light during imes of stress and as a neurotransmiter in the central nervous system.
