Identify the letter of the choice that best completes the statement or answers the question.
The main function of myelin is to
The part of the nerve cell specialized for conducting information is the
The cell body of a neuron is also called the
Neurons are made up of dendrites, a soma, and
Which of the following is NOT a part of a neuron?
The nature of a nerve impulse is primarily a/an __________ event; whereas, the nature of the communication between neurons is primarily a/an __________ event.
Acetylcholine, epinephrine, dopamine, and histamine are
The conduction of a nerve impulse down the axon is called a(n)
Communication within a neuron is __________, while communication between neurons is __________.
The branching fibers of the __________ end in __________ and link with parts of other neurons.
After successfully running from the large, snarling, drooling grizzly bear that was running directly toward you, you pause to catch your breath and collect your wits. The physical symptoms you now experience are controlled by the
An action potential actually occurs because
The charge that exists across the nerve cell membrane is a result of differing
The part of the neuron that specializes in receiving messages from other neurons is the
Nerve cell bodies and dendrites are not the only locations sensitive to neurotransmitters. Receptor sites can also be found on
The channels that transport sodium and potassium within the axon are called
Neurons conduct an action potential
Neurotransmitters are primarily associated with the
Body cells specialized to carry and process information are called
Which is the best explanation of how a nerve impulse is carried from one neuron to another? The action potential or impulse
The fastest neurons can send impulses at about __________ miles per hour.
A nerve cell carrying information from your brain to muscles and glands is called a(n)
The "emergency" part of the nervous system that prepares the body for "fight or flight" is the __________ branch.
The effect of mind-altering drugs may be a result of their
A nerve impulse is also called a(n)
Muscles can contract because they are made up of
The "all-or-nothing event" refers to the fact that
A barefoot child steps on a bee, then jerks his or her foot back in response to the sting. This response has likely involved all parts of the nervous system EXCEPT
The chemicals released at an axon terminal are called
Neurotransmitters are released at the
An action potential refers to the traveling of a nerve impulse along the
The role of the __________ nervous system is to relax the body and return it to a lower level of arousal.
Electrically charged particles of the elements __________ are crucial in the transmission of the nerve impulse.
The autonomic nervous system contains two branches called the
__________ is the correct sequence of events in communicating a stimulus (such as stepping on a tack) to another neuron.
Information is first received by a nerve cell at the
In the nervous system, electrical charges are set up because of unequal concentrations of ions inside and outside the cell. This state is known as a(n)
The function of the sympathetic nervous system is to prepare the body for
The microscopic space between two neurons is called a(n)
A nerve cell carrying information from your eyes, ears, fingers, etc. toward the CNS is called a(n)
Emotional responses to a traumatic event are most directly under the control of the
The fatty layer of tissue that gives many nerves a whitish color is called
The soma is the part of the nerve cell that
What effect do neurotransmitters from one neuron have on the next neuron?
Many of the chemicals that affect the brain operate by