Select one: O A. hyperpolarizing phase; K channels open B. hyperpolarizing phase: Na channels open C. depolarization: Na channels open O D. repolarizing phase: Na channels closed O E repolarizing phase: K channels open

The action potential is split into 4 parts (A-D). For each part, 1. Describe what stimulated the channel responsible for this part, 2. what is the likely ion that is moving and 3. explain which direction the ion had to move to create the measured membrane potential.

Which of the following statements is FALSE? a. graded potentials can sum over time and space, action potential cannot b. action potentials have refractory periods, graded potentials do not c. action potentials are all-or-none, graded potentials are not d. graded potentials and action potentials are caused by ions moving through open channels e. all of the above statements are true (if all of the above are true this is the correct answer) ....

On the graph above, when do the sodium ion channels close? Select one: a. between 0.2 ms and 0.5 ms, which is when depolarization occurs b. at 0.2 ms, which is when depolarization occurs c. at 0.5 ms, which is when repolarization begins d. between 0.5 ms and 0.8 ms, which is when repolarization occurs

Which of the following allows the cell to recover from hyperpolarization during an action potential?   A. Stimulus gated sodium channels B. voltage gated sodium channels C. voltage gated potassium channels D. sodium/potassium pump

What proteins are responsible for membrane potential in section 1 potassium leak channels opening of potassium channels opening of ligand gated sodium channels Na+/K+ Atpase opening of sodium channels

On what part of the neuron are NT receptors typically located?  If the activated NT receptors cause channels to open or change thus changing the diffusion of ions, what type of potential will this initially produce? A.Resting B.Graded C.Action D.Homeostatic

1. What is action potential? Please describe the ionic mechanisms of depolarization and repolarization phase of action potential in the squid giant axon. please write more and more

during the absolute refractory period k+ channels are open while na+ channels are   1. activated 2.inactivated 3.deactivated

Under what conditions could the opening of a chloride channel actually depolarize a neuron rather than hyperpolarize it? i. The neuron is resting at -75 mVii. The extracellular chloride concentration is lower than the intracellular chloride concentrationiii. The neuron is close to its threshold of -55 mVa. i onlyb. iii onlyc. i and ii onlyd. ii and iii onlye. i, ii, and iiif. None of these