Exam 48: Neurons, Synapses, and Signaling

When several EPSPs arrive at the axon hillock from different dendritic locations, depolarizing the postsynaptic cell to threshold for an action potential, this is an example of

After the depolarization phase of an action potential, the resting potential is restored by

Which of the following is a direct result of depolarizing the presynaptic membrane of an axon terminal?

The heart naturally slows when responding to

The "threshold" potential of a membrane

When several IPSPs arrive at the axon hillock rapidly in sequence from a single dendritic location, hyperpolarizing the postsynaptic cell more and more and thus preventing an action potential, this is an example of

Functionally, this cellular location is the neuron's "decision-making site" as to whether or not an action potential will be initiated:

Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experimentally depolarize the middle of the axon to threshold, using an electronic probe, then

For the following questions, refer to the graph of an action potential in Figure 48.1 and use the letters to indicate your answer. Figure 48.1 -The membrane's permeability to sodium ions is at its maximum at label

Most of the neurons in the human brain are

Saltatory conduction is a term applied to conduction of impulses

Action potentials move along axons