Chapter 10: The Nervous System: Introduction. Quiz.

Nerve cells known as ____ transmit nerve impulses in the form of electrochemical changes.

neurons

The chemicals that transmit signals across the synapse are called ____.

neurotransmitters

Most sensory neurons are ____ neurons.

unipolar

​Star-shaped cells that form a supporting network in the brain and spinal cord are called ____.

​astrocytes

A bundle of fibers located outside the central nervous system is called a(n) ____.​

​nerve

There are ____ pairs of cervical nerves.

8

Which of the three spinal meninges is the most superficial?

Dura mater

Myelin sheaths surrounding nerve fibers in the peripheral nervous system are produced by ___.

Schwann cells

Most synapses in our bodies use the ____ neurotransmitter.

acetylcholine

The parasympathetic division of the autonomic nervous system uses the neurotransmitter ____ at nerve endings.

acetylcholine

The term central nervous system refers to the:

brain and spinal cord

The ____ nervous system consists of the brain and spinal cord.​

central

The peripheral nervous system consists of:

cranial nerves and spinal nerves

The outermost spinal meninx is called the ___.

dura mater

The final nerve cell that receives the impulse and brings about the reaction to the original stimulus is called the motor or ____ neuron.

efferent

​Neurons that convey information from the brain and spinal cord to muscles and glands are called ____ neurons.

efferent

Cells that line the fluid-filled ventricles of the brain, some of which produce cerebrospinal fluid, are called ____.​

ependymal cells

The space that separates the meninges from the vertebrae is called the ____ space.

epidural

Nerve cell bodies found outside the central nervous system are called ___.

ganglia

Areas of the nervous system known as ____ consist of nerve cells bodies and dendrites.

gray matter

The spinal cord is a continuation of the ____.​

medulla oblongata

​All the spinal nerves are ____ nerves.

mixed

Descending tracts of the central nervous system that conduct impulses down the spinal cord are concerned with ____ functions.​

motor

Neurons that have several dendrites and one axon are called ____ neurons.

multipolar

​A bundle of nerve cells or fibers is called a ____.

nerve

The ____ system is the body's control center and communication network.

nervous

Ascending tracts of the spinal cord carry ____ information from body parts to the brain.

sensory

​The ____ division of the autonomic nervous system stimulates and speeds up certain bodily activities.

sympathetic

Terminal branches of an axon are anchored close to the ends of the dendrites of another neuron at regions called ___​.

synapses

A bundle of fibers inside the central nervous system is called a ____.

tract