#Question id: 11187
#Unit 7. System Physiology – Animal
Refer to the following graph of an action potential to answer the question.
The membrane's permeability to sodium ions is greatest at label ________.
#Question id: 11188
#Unit 7. System Physiology – Animal
Refer to the following graph of an action potential to answer the question.
The minimum graded depolarization needed to operate the
voltage-gated sodium and potassium channels is indicated by the label ________.
#Question id: 11189
#Unit 7. System Physiology – Animal
Refer to the following graph of an action potential to answer the question.
At label ________, the cell is not hyperpolarized;
however, repolarization is in progress, as the sodium channels are inactivated
or becoming inactivated, and many potassium channels have opened.
#Question id: 11190
#Unit 7. System Physiology – Animal
For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the ________.
#Question id: 11191
#Unit 7. System Physiology – Animal
Opening all of the sodium channels on an otherwise typical neuron, with all other ion channels closed (which is an admittedly artificial setting), should move its membrane potential to ________.
#Question id: 11192
#Unit 7. System Physiology – Animal
A graded hyperpolarization of a membrane can be induced by ________.