BIOL 206 Lecture 27: Animal Sensing and Responding
Document Summary
Animal sensing and responding: phototropin by blue light will activate certain protein kinase. It is like de-charging a batter becomes more positive. To get back to fully charge state must repolarize. Electricity is simply the flow of charge. Diffusion of potassium out of cell= slow. Inside cell -----finding receptor is largely by chance message needs: gated ion channel is not open all of the time. Electricity (voltage,) chemicals(dephosphorylating), mechanical can change shape of ion channel by distorting proteins: animal body plan innovations are 1 degree elated to getting nutrition and or avoiding predation, receptors working with nervous tissue. Sense changes in the internal or external environment. Help regulate function in other tissues (effectors) Conduct intercellular messaging via electrochemical signaling: integration in animal nervous system mean synapse between neurons and neurons and effectors, in animals muscles and glands serves as effectors, nervous tissue controls effectors, ner(cid:448)es do(cid:374)"t ha(cid:448)e (cid:272)ell (cid:271)odies.
