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bionblecture3 - BioNB 221 Lecture 3 Single gene effects...

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BioNB 221 Lecture 3 Single gene – effects behavior - nervous system effects - developmental effects – nerve cells don't communicate properly - or functional effects - problems with action potential; release more neurotransmitters need to know: - how nervous system generates behavior - could act in a circuit - ex: - simple nervous system circuit that generates response: place hand on hot surface – generates withdrawal of arm imagine diagram: Skin ---- pain sensory neuron ----- motor neurons ----- muscle : produce contraction - heat receptors in skin; nerve produces action potentials : produced by opening and closing ion channels; chemical neurotransmitters released at terminals; receptors → transmitter release - possible changes that effect response : - Receptors not there; more or less responsive to heat - action potential changes: changes in ion channel opening - developmental reasons : cells that respond to heat aren't even born at all; path finding axon genes don't make proper connections → ex. Sensory receptors causes muscle to hold out
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This note was uploaded on 03/16/2010 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell.

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bionblecture3 - BioNB 221 Lecture 3 Single gene effects...

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