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Hole's Human Anatomy & Physiology, 9/e

David Shier, Washtenaw Community College
Ricki Lewis, The University at Albany
Jackie Butler, Grayson County Community College

Nervous System I: Basic Structure and Function

Multiple Choice Quiz

Please answer all questions


1	Branched nerve fibers that convey impulses toward the cell body of a neuron are called _____________.
		A)	axons
		B)	dendrites
		C)	axon collaterals
		D)	axon terminals


2	Myelin sheaths on the outsides of many axons are contributed by ______________.
		A)	the axon itself
		B)	secretory vesicles
		C)	Schwann cells
		D)	the cell bodies of the neuron


3	A neuron with many nerve fibers arising from its cell body and that carries impulses away from the brain would be classified as __________________.
		A)	multipolar
		B)	bipolar
		C)	unipolar and sensory
		D)	multipolar and motor


4	Which types of neurons are likely to increase muscular activities?
		A)	accelerator neurons
		B)	inhibitory neurons
		C)	bipolar neurons
		D)	sensory neurons


5	The _______________ are the types of neuroglial cells that provide myelin in the central nervous system.
		A)	astrocytes
		B)	oligodendrocytes
		C)	microglia
		D)	ependyma


6	Which type of neuroglial cells help regulate the composition of cerebrospinal fluid?
		A)	astrocytes
		B)	oligodendrocytes
		C)	microglia
		D)	ependyma


7	Cut neurons possess limited capabilities for regeneration. The type of neuroglial cell that aids regeneration by forming a regeneration tube to help reestablish the former connection is the _______________.
		A)	Schwann cell
		B)	astrocyte
		C)	microglial cell
		D)	ependymal cell


8	At resting potential, the ion distribution inside and outside of a neuron is such that __________ ions are most abundant on the outside of the cell, while __________ ions are most abundant on the inside of the cell.
		A)	potassium; sodium
		B)	sodium; potassium
		C)	calcium; phosphate
		D)	sulfate; potassium


9	In response to a stimulus, if the membrane potential becomes more negative than the resting potential, we say the membrane is _______________.
		A)	hyperpolarized
		B)	depolarized
		C)	unpolarized
		D)	polarized


10	When a neuron reaches action potential, it depolarizes and repolarizes in an amount of time on the order of ________________.
		A)	seconds
		B)	milliseconds
		C)	microseconds
		D)	nanoseconds


11	Select the incorrect statement about nerve impulse conduction.
		A)	Saltatory conduction involves Schwann cells and occurs at greater speed than on unmyelinated fibers.
		B)	Nerve impulses occur in an all-or-none manner.
		C)	The neuron cannot be stimulated during the absolute refractory period.
		D)	The strength of impulses carried along a single nerve fiber can vary with the strength of their stimulus.


12	Excessive sleeping is most likely due to the presence of too much of which neurotransmitter?
		A)	GABA
		B)	norepinephrine
		C)	serotonin
		D)	dopamine


13	Myasthenia gravis reflects a deficiency in communication by _______________ because receptors for this neurotransmitter have been destroyed.
		A)	acetylcholine
		B)	norepinephrine
		C)	GABA
		D)	dopamine


14	The levels of which neurotransmitter are affected by the mood-elevator, cocaine?
		A)	serotonin
		B)	GABA
		C)	norepinephrine
		D)	acetylcholine


15	Fibers that originate from different parts of the nervous system and lead to the same neuron are exhibiting _____________.
		A)	facilitation
		B)	convergence
		C)	divergence
		D)	neuromodulation


16	Which term does not belong with the others?
		A)	brain
		B)	spinal cord
		C)	CNS
		D)	spinal nerve


17	Which items should not be grouped together?
		A)	spinal nerve
		B)	cranial nerve
		C)	spinal cord
		D)	PNS


18	The cells that conduct messages towards the brain are the:
		A)	motor neurons
		B)	sensory neurons
		C)	interneurons
		D)	neuroglia


19	Nerves impulses always travel to the brain through _____ fibers.
		A)	neuron
		B)	dendrite
		C)	nerve
		D)	axon


20	The myelin sheath around a neuron is actually produced by the:
		A)	neuron
		B)	axon
		C)	dendrite
		D)	Schwann cell


21	Which of these cells does not belong with the others?
		A)	microglia
		B)	neuron
		C)	astrocyte
		D)	oligodendroglia


22	The _____ cells are capable of removing a blood clot from the brain.
		A)	astrocyte
		B)	oligodendrocyte
		C)	microglia
		D)	ependymal


23	Which of these is true when a neuron is at rest?
		A)	the outside is positive
		B)	the outside is negative
		C)	there is no voltage
		D)	the inside is positive


24	The most common neurotransmitter in the body is _____.
		A)	serotonin
		B)	dopamine
		C)	acetylcholine
		D)	norepinephrine

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