front 1 What is responsible for ESTABLISHING the RESTING membrane potential of a cell? | back 1 faster leaking (greater permeability) to K |
front 2 What term describes the cell membrane potential of a neuron at rest? | back 2 polarized |
front 3 T or F: A graded potential may be depolarizing or hyperpolarizing. | back 3 True |
front 4 In the process of generating an action potential, which occurs first? | back 4 ligand-gated Na channels open |
front 5 the channels most directly responsible for the voltage change recorded in a PHASE 1 of an action potential graph. | back 5 voltage-gated Na channels |
front 6 The type of channel most likely to be open during the repolarization phase | back 6 voltage-gated K+ channels |
front 7 T or F: A strong stimulus produces a strong action potential. | back 7 False |
front 8 During the relative refractory period, a second action potentialSelect an answer and submit. a) cannot be elicited b) can be elicited by a threshold stimulus c) can be elicited by a subthreshold stimulus d) can be elicited by a suprathreshold stimulus e) Either B or D | back 8 e) Either B or D |
front 9 Saltatory conduction refers to which of the following? a) The conduction of a graded potential along a myelinated axon. b) The conduction of an action potential along a myelinated axon. c) The conduction of an action potential along an unmyelinated axon. d) The conduction of a graded potential along an unmyelinated axon. | back 9 b) The conduction of an action potential along a myelinated axon. |
front 10 As the axon hillock depolarizes, voltage-gated Na+ channels open and Na+ moves (into or out of) ______________ the cell causing further (depolarization or repolarization) ______________. | back 10 into; depolarization |
front 11 What is the primary difference between graded potentials versus actions potentials? | back 11 In neurons, action potentials occur in axons, while graded potentials occur in the dendrites and cell bodies |
front 12 Absolute and relative refractory periods are important aspects of which of the following? a) Action potentials b) Resting potentials c) Hyperpolarizing graded potentials d) Graded potentials | back 12 a) Action potentials |
front 13 What will Hypokalemia (low extracellular K+ concentration), if sustained, cause? | back 13 hyperpolarization and difficulty achieving action potentials |