45. Nervous System

Which phase of the action potential is characterized by a rapid influx of Na$^+$ ions, resulting in a sharp rise in membrane potential?

Which of the following best describes the role of voltage-gated sodium (Na^+) channels during the initiation of an action potential in a neuron?

Which of the following scenarios is most likely to trigger an action potential in a neuron?

If the membrane potential of a neuron decreases, the membrane potential _____.

What is the primary function of the nervous system?

During an action potential, the loss of potassium ions ($K^+$) from the cell results in:

In order for a neuron to generate an action potential, which of the following must occur?

A certain toxin blocks voltage-gated potassium (K^+) channels in neurons. What is the likely impact of this toxin on the resting potential of a neuron?

Short fibers that branch out from the cell body and receive incoming messages are called:

Which of the following best describes the function of a motor neuron (indicated by the letter A) in the nervous system?

Which term refers to an event that activates a neuron and begins an action potential?

Which of the following is a similarity between a hair cell and a typical neuron?

Which nutrient is directly involved in the generation of action potentials in neurons by contributing to the depolarization phase?

How does a neuron transport enzymes produced in the neurosoma to its axon terminals?

Which part of a neuron contains vesicles that house neurotransmitters?