Lecture 17

Lecture 17 - Lecture 17: Chemical Synapses, Sensory...

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Dr. Paula Lemons BIOL 1104 Lecture 17: Chemical Synapses, Sensory Receptors and Effectors
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Learning Objectives Recreate, using your own words and diagrams, neuron communication at the synaptic cleft (reference Figure 27.5 and BioFlix animation). Define excitatory and inhibitory post-synaptic potentials. Explain the different types of post-synaptic summation. List some common neurotransmitters and what they are involved in. Given new data synaptic transmission, predict how that data would impact neuron communication. Recreate, using your own words and example diagrams, how sensory receptor cells convert stimuli to neural (electrical) signals. Apply your understanding to other types of sensory input. Explain, in your own words, the mechanism of muscle contraction, including the way that a motor neuron triggers contraction. Predict the outcome of various malfunctions of the muscle contraction system or neuromuscular junction.
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What Makes Neurons Special? 1. They can change their membrane potential rapidly and in a controlled way  Action Potential. 2. The action potential can propagate along the length of the cell. 3. A change in the voltage in one neuron can lead to a change in voltage in another neuron.
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Dendrites Stimulus Nucleus Cell body Axon hillock Presynaptic cell Axon Synaptic terminals Synapse Postsynaptic cell Neurotransmitter
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Comparable to Fig. 27.6 Synapse
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Synapse Comparable to Fig. 27.6
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BioFlix Animation How Synapses Work. Download from eLC under Lectures.
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Neurotransmitters Biogenic amines Epinephrine Norepinephrine Serotonin Dopamine Peptides Endorphins
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cell body of postsynaptic cell synaptic terminals of presynaptic cells Figure 27.6 Synaptic Integration
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Lecture 17 - Lecture 17: Chemical Synapses, Sensory...

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