45. Nervous System

Which event triggers the creation of an action potential in a neuron?

Which type of neuron is primarily found in the retina of the eye?

In a neuron, the opening of sodium ($\mathrm{Na^+}$) gates typically leads to:

An action potential involves the temporary ________ through an axon membrane.

Where do most action potentials originate in a neuron?

The neuron processes that normally receive incoming stimuli are called:

Bipolar neurons are commonly ________.

Which sequence correctly describes how different types of neurons work together to sense, process, and respond to a stimulus?

Which of the following best describes what happens when an action potential occurs in a neuron?

Which factor primarily determines whether a neuron will generate an action potential?

Which one of the following best describes how neurons transmit messages to one another?

Saltatory conduction is made possible by ________.

The neural processes that convey incoming messages toward the cell body are indicated by which of the following?

An axon can range in length from a fraction of an inch to:

Which step of nerve or muscle firing would be directly affected by a change in extracellular K\(^+\) concentration?