Exam 10: Nervous System I: Basic Structure and Function

If a resting potential becomes more negative, the membrane is

The difference in electrical charge between the inside and outside of a polarized neuron cell membrane is called the ________ ________.

Opiate drugs derived from poppies relieve pain in humans because the human nervous system has

Each neuron in the CNS may receive input from

A physiologist testing signal transduction rates in two different nerves notices that one fiber conducts signals much faster than the other. Which is the most likely difference between the two?

In convergence, two or more incoming fibers contact a single neuron, whereas in divergence, impulses leaving a neuron pass into several output fibers.

What structure supports the axon from within?

Migraine results from

The cells in the nervous system that fill spaces and support neurons both physically and nutritionally are called ________.

In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.

Neuroglia are specialized to react to environmental change, and neurons support neuroglia.

Clusters of neuron cell bodies in the PNS are called ________.

A mixed nerve includes different neuroglial cells.

A neuron receives a stimulation that causes Cl- channels to open, resulting in a hyperpolarization of the neuronal membrane. This situation is an example of a(n)

Dendrites on unipolar neurons are parts of

Sensory receptors are part of the CNS.