Lecture10-2009W - Physiology of Control Neurons vs...

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Physiology of Control Example: How does a lemur control and integrate the functions of all the cells in its body? [ Neurons vs. Endocrine cells ] 1. MR of muscles 2. Blood pressure 3. Blood flow to the gut 4. Sensory input by integrative functions of nervous system & endocrine system Neurons and endocrine cells compared A. Nervous system B. Endocrine system 1. neurotransmitters ( barb2right synaptic cleft) 2. fast (20-100 m/s, >100 pulses/s) 3. addressed (precisely targeted) 1. hormones ( barb2right blood) 2. slow 3. broadcast 4. responsive target cells Combined : Neurosecretory cells barb2right neurohormones
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Physiological basis of Neuronal Function barb2right Nervous system, comprised of neurons + glial cells Morphology of a Neuron Information flow between Neurons (1) afferent neurons (2) interneurons (3) efferent neurons (4) effectors Sensory Motor - excitatory - inhibitory Organization & comparison of Nervous System head2right NS organizes neurons into functional circuits head2right Muticellular animals have diversed
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