Exam 2: Nerve Cells and Nerve Impulses

The greater the surface area of a dendrite, the more information it can receive from other neurons.

Which of the following contributed most to Cajal's ability to find that neurons are separate from one another?

The insulating material which covers many vertebrate axons is called the:

The membrane of a neuron is composed of ____ with ____ embedded in them.

Briefly describe the function of voltage-gated channels.

A drug that blocks the sodium gates of a neuron's membrane would:

The structure that contains the chromosomes is called the:

During the entire course of events from the start of an action potential until the membrane returns to its resting potential, what is the net movement of ions?

As a general rule, where do axons convey information?

A drug would prevent an action potential if it:

What receives excitation from other neurons and conducts impulses to muscle or gland cells?

During the relative refractory period:

Briefly describe the structure of the blood-brain barrier and why it is important.

Neurons typically have one ____, but many ____.

Neurons receive information and transmit it to other cells.

To what does saltatory conduction refer?

Where do most action potentials begin?

Most chemicals can easily cross the cell membrane of a neuron.

Which of the following is a characteristic of glial cells in the human brain?

Glucose enters the brain via which type of transport?