Exam 46: Organization of the Nervous System, Basic Functions of Synapses, and Neurotransmitters

Increased conductance of which of the following ions is most likely to have the least effect on membrane potential?

The opening of which of the following ion channels would have the least effect on the resting membrane potential of an average neuron?

Transmitter activation of ion channels on dendrites can dictate neuronal excitation or inhibition acutely by affecting which aspect of the soma membrane?

Transmission of the electrical signal from the dendrites to the soma of a neuron occurs by which of the following?

Hypoventilation is most likely to have which of the following effects on a typical neuron in the central nervous system?

Posttetanic facilitation is thought to be the result of which of the following?

Prolonged changes in neuronal activity are achieved through the activation of which of the following?

In a neuron with a resting membrane potential of -65 mV, the distribution of which ion across the neuronal membrane represents the greatest potential electromotive force?

Forced rapid breathing results in alkalization of the blood, which would lead to which of the following changes in neuronal activity?

Hypoventilation causes arterial blood carbon dioxide levels to rise. Higher arterial blood carbon dioxide levels increase neuronal activity.

Which of the following statements best describes the role of calcium in the release of a neurotransmitter substance from the presynaptic nerve terminal?

An excitatory postsynaptic potential is most likely to result from which of the following?

An inhibitory postsynaptic potential is most likely to result from opening which of the following?

In a neuron with a resting membrane potential of -65 mV, the distribution of which ion across the neuronal membrane represents the least potential electromotive force?

Which of the following neurotransmitters is thought to be involved in the phenomenon of presynaptic inhibition?