Lecture10-2009W

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 endocrine system Neurons and endocrine cells compared A. Nervous system B. Endocrine system 1. neurotransmitters ( b synaptic cleft) 2. fast (20-100 m/s, >100 pulses/s) 3. addressed (precisely targeted) 1. hormones ( b blood) 2. slow 3. broadcast 4. responsive target cells Combined : Neurosecretory cells b neurohormones
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Physiological basis of Neuronal Function b 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 h NS organizes neurons into functional circuits h Muticellular animals have diversed
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Lecture10-2009W - Physiology of Control [ Neurons vs....

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