209-study guide 1 - BIOS 209 PHYSIOLOGY STUDY GUIDE What is...

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BIOS 209 PHYSIOLOGY STUDY GUIDE What is the origin of a cell’s resting membrane voltage What is the role of the NaK-ATPase What is the distribution of Na + and K + across a cell plasma membrane A resting cell is permeable to what ion. What are ion channels. What is an equilibrium voltage What is the equilibrium voltage for Na + ? For K + ? What is a voltage-gated ion channel When would it open. What is a threshold voltage and what is its role? Where might you find voltage-gated ion channels Plot or graph the voltage change associated with an action potential. Where on this plot do the channels open and close. What is going on at each point on this graph (where are ions flowing etc) How does an action potential propagate along the axon of a neuron. What causes the sequential opening of Na+ channels What causes the sequential opening of K+ channels What is a ligand-gated ion channel. What causes it to open. Where are they found on a neuron or muscle fiber. What is the difference between depolarization and hyperpolarization. Would opening a Na channel cause a cell to depolarize or hyperpolarize Opening a K or Cl channels would have what effect on membrane voltage What is the difference in the rate at which voltage gated Na and K channels open.
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