Exam 44: Neurons, Glia, and Nervous Systems

When an action potential arrives at an axon terminal, it causes the opening of _______ channels, which triggers fusion of neurotransmitter vesicles with the cell membrane.

Prozac works by slowing the reuptake of serotonin by the _______ neuron, which enhances the activity of serotonin at the synapse.

The force that causes electrically charged particles to move between two points is _______.

Which statement concerning action potentials is false?

Which statement about the process of summation in a neuron is false?

Astrocytes influence the connectivity between a pre- and postsynaptic neuron by

Transmission at chemical synapses is slow compared with that at electrical synapses.This difference might reflect

When you step on a sharp tack and pull your foot away, this movement involves all of the following except

Damage to which brain structure would affect basic physiological functions?

Which statement about gated ion channels is false?

In the vertebrate neuromuscular junction, acetylcholine leaves the presynaptic neuron through the process of _______.It then diffuses across the synaptic cleft and _______.

Which characteristic of chemical synapses contributes to diverse postsynaptic responses?

In a thin section through brain tissue, you see a cell that is wrapped around the axon of a neuron, forming concentric layers of cell membrane.This cell most likely

In the spinal cord, the gray matter contains the _______, and the white matter contains the _______.

In the neural tube of an early frog embryo, neuronal stem cells begin to divide asymmetrically.What cells result from these asymmetrical divisions?

Refer to the graph showing the course of an action potential. Which of the numbered points along the graph represents a state created by leak potassium channels? What is this state of the membrane called?

Multiple sclerosis and Guillain-Barre syndrome both involve damage to myelin, although the location of the affected myelin differs.Multiple sclerosis affects myelin in the central nervous system, whereas Guillain-Barre syndrome affects myelin in the peripheral nervous system.This means that multiple sclerosis affects _______ and Guillain-Barre affects _______.

Refer to the figure showing a postsynaptic neuron summing information. The black arrow in the figure indicates

If you were a neurobiologist interested in recording in real time the activities of single ion channels, then you might use the technique of _______.

Which statement about the summation of postsynaptic potentials is false?