Exam 3: Cells of the Nervous System

Bipolar neurons have two branches leaving the cell body,and are frequently found in the sensory systems of mammals.

The initial cone-shaped segment of an axon at the junction with the cell body is known as a

The resting potential of a neuron is primarily dependent on the movement of

In the human nervous system,there are approximately

Calcium channels

During exocytosis,____________________ ions enter the presynaptic terminal and trigger the migration of ____________________.

The vast majority of neurons are classified as

The major bulk of the neuron,containing the nucleus and other organelles,is known as the

The action of tetanospasmin,the toxin responsible for tetanus,interferes with the

The bare axon membrane between two segments of myelin is known as a(n)

Neurons that are not specialized for either sensory or motor functions are known as

The most common type of glia in the CNS is the

Which type of glia is responsible for forming myelin in the central nervous system?

Following birth,an organism's dendrites are incapable of further growth or structural change.

Ribosomes are built by the

The tendency for molecules with like signs to move apart and molecules with opposite signs to move together is known as

Mitochondria are responsible for the production of proteins in the neural cell body.

The primary advantage of electrical synapses over chemical synapses is

The influx of calcium ions during exocytosis

In a myelinated axon,action potentials are produced