Please answer all questions.

1			The central nervous system is comprised of the brain and _____.
			A)	cranial nerves
			B)	spinal cord
			C)	peripheral nerves
			D)	spinal nerves
2			The______of a neuron carries the impulse towards the nucleus.
			A)	cell body
			B)	myelin
			C)	axon
			D)	dendrite
3			Which part of a neuron is directly involved with protein synthesis?
			A)	cell body
			B)	neurofibrils
			C)	Nissl body
			D)	neurolemma
4			Which part of a neuron comes in close proximity to another neuron at the synapse?
			A)	synaptic knob
			B)	dendrite
			C)	axon
			D)	collateral fiber
5			The phagocytic cells in the CNS are the ______.
			A)	astrocytes
			B)	microglia
			C)	oligodendrocytes
			D)	ependymal cells
6			The _____cells provide a means of acquiring nutrients in the brain.
			A)	astrocyte
			B)	microglia
			C)	ependymal
			D)	oligodendrocyte
7			The resting potential of a neuron is _____mv.
			A)	+30
			B)	-70
			C)	0
			D)	-90
8			The minimal stimulus needed to cause a neuron to transmit an impulse is called the _____.
			A)	action potential
			B)	resting potential
			C)	threshold
			D)	refractory period
9			Saltatory conduction occurs when an impulse jumps from _____.
			A)	axon to dendrite
			B)	node to node
			C)	dendrite to axon
			D)	node of Ranvier to axon
10			The most common neurotransmitter in the body is _____.
			A)	norepinephrine
			B)	adrenalin
			C)	acetylcholine
			D)	dopamine
11			Acetylcholine is decomposed by _____almost as fast as it is released.
			A)	monoamine oxidase
			B)	MAO inhibitors
			C)	norepinephrine
			D)	acetylcholinesterase
12			The following belong together except which one?
			A)	norepinephrine
			B)	acetylcholine
			C)	epinephrine
			D)	adrenalin
13			A morphine-like pain suppressing brain substance is _____.
			A)	substance P
			B)	beta-endorphin
			C)	nicotine
			D)	neuropeptide
14			A change in a dendrite which lessens the probability of a conduction is the _____.
			A)	EPSP
			B)	IPSP
			C)	threshold potential
			D)	action potential
15			A drug, which prevents over-stimulation by the PNS neurons, is _____.
			A)	curare
			B)	caffeine
			C)	amphetamine
			D)	tricyclic anti-depressant
16			Which of the following does not belong with the rest?
			A)	summation
			B)	facilitation
			C)	divergence
			D)	convergence
17			Which type of short neuron is found in the retina?
			A)	bipolar
			B)	unipolar
			C)	multipolar
			D)	sensory
18			The following belong together except which one?
			A)	multipolar
			B)	motor
			C)	sensory
			D)	efferent
19			The following belong together except which one?
			A)	interneuron
			B)	intercalated neuron
			C)	association neuron
			D)	sensory neuron
20			The nucleus of a sensory neuron can be found within the _____.
			A)	CNS
			B)	ganglia
			C)	myelin sheath
			D)	spinal cord
21			Gross nerves that contain sensory impulses are referred to as _____.
			A)	afferent
			B)	roots
			C)	mixed
			D)	efferent
22			The PNS is comprised of cranial nerves and _____.
			A)	spinal cord
			B)	sensory nerves
			C)	the brain
			D)	spinal nerves
23			Collaterals are fibers arising from the ____of neurons.
			A)	dendrite
			B)	axon
			C)	soma
			D)	synapse
24			Nerves that carry impulses from the heart to the brain could be classed as _____fibers.
			A)	somatic efferent
			B)	visceral efferent
			C)	somatic afferent
			D)	visceral afferent
25			The cells that produce myelin in the PNS are the ______.
			A)	oligodendrocytes
			B)	axons
			C)	Schwann cells
			D)	ependymal
26			The following could be grouped together except which one?
			A)	association
			B)	motor
			C)	internuncial
			D)	interneuron
27			The ______cells play a role in the establishment of a blood-brain chemical barrier.
			A)	microglia
			B)	neuron
			C)	astrocyte
			D)	ependymal
28			Branched nerve fibers that convey local potential changes toward the cell body of a neuron are called _____________.
			A)	axons
			B)	dendrites
			C)	axon collaterals
			D)	axon terminals
29			Myelin sheaths on the outsides of many axons in the peripheral nervous system are contributed by ______________.
			A)	the axon itself
			B)	secretory vesicles
			C)	Schwann cells
			D)	the cell bodies of the neuron
30			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
31			Which types of neurons are likely to increase muscular activities?
			A)	excitatory neurons
			B)	inhibitory neurons
			C)	bipolar neurons
			D)	sensory neurons
32			The _______________ are the types of neuroglial cells that provide myelin in the central nervous system.
			A)	astrocytes
			B)	oligodendrocytes
			C)	microglia
			D)	ependyma
33			Which type of neuroglial cells help regulate the composition of cerebrospinal fluid?
			A)	astrocytes
			B)	oligodendrocytes
			C)	microglia
			D)	ependyma
34			Cut neurons in the PNS 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
35			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
36			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
37			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
38			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 axon can vary with the strength of the initiating stimulus.
39			Excessive sleeping is most likely due to the presence of too much of which neurotransmitter?
			A)	GABA
			B)	norepinephrine
			C)	serotonin
			D)	dopamine
40			Myasthenia gravis reflects a deficiency in communication by _______________ because receptors for this neurotransmitter have been destroyed.
			A)	acetylcholine
			B)	norepinephrine
			C)	GABA
			D)	dopamine
41			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
42			Which term does NOT belong with the others?
			A)	brain
			B)	spinal cord
			C)	CNS
			D)	spinal nerve
43			Which items should NOT be grouped together?
			A)	spinal nerve
			B)	cranial nerve
			C)	spinal cord
			D)	PNS
44			The cells that conduct messages towards the brain are the_______________.
			A)	motor neurons
			B)	sensory neurons
			C)	interneurons
			D)	neuroglia
45			Which of these cells does NOT belong with the others?
			A)	microglia
			B)	neuron
			C)	astrocyte
			D)	oligodendrocyte
46			The _____ cells are capable of removing a blood clot from the brain.
			A)	astrocyte
			B)	oligodendrocyte
			C)	microglia
			D)	ependymal
47			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