Name: 
 

Neuroscience Practice Test 1



True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

Efferent nerve fibers may be described as motor nerve fibers.
 

 2. 

During depolarization, the inside of the neuron's membrane becomes less negative.
 

 3. 

Neurons do not undergo mitosis in any part of an adult human.
 

 4. 

Endorphins are peptides that act like morphine.
 

 5. 

The nodes of Ranvier are found only on myelinated neurons.
 

 6. 

Temporal summation occurs when the postsynaptic neuron is being stimulated by a large number of terminals from the same or different neurons at the same time.
 

 7. 

The parasympathetic division is a branch of the somatic nervous system.
 

 8. 

Neurotransmitters can be removed from the synapse by enzymes.
 

 9. 

When a neuron depolarizes, its membrane potential moves from -70 toward -90.
 

 10. 

The space between the axon terminal of one neuron and the dendrite of another is called the neural gap.
 

 11. 

It is better for the animal life if a pond or lake is stagnant.
 

 12. 

The neurotoxin Saxitoxin causes damage by blocking sodium gates.
 

 13. 

Positron emission tomography can be used to determine what part of the brain is active during different mental and physical activities.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 14. 

Direct-acting neurotransmitters
a.
mediate very slow responses.
b.
open ion channels to provoke rapid responses.
c.
act through second messengers.
d.
require cyclic AMP.
 

 15. 

An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is
a.
gamma aminobutyric acid.
c.
cholinesterase.
b.
acetylcholine.
d.
norepinephrine.
 

 16. 

The role of acetylcholinesterase is to
a.
act as a transmitting agent.
b.
destroy ACh a brief period after its release by the axonal endings.
c.
amplify or enhance the effect of ACh.
d.
stimulate the production of serotonin.
 

 17. 

Which of the following is not a function of the autonomic nervous system?
a.
innervation of glands
b.
innervation of skeletal muscle
c.
innervation of smooth muscle of the digestive tract
d.
innervation of cardiac muscle
 

 18. 

Saltatory conduction is made possible by
a.
the myelin sheath.
c.
large nerve fibers.
b.
diphasic impulses.
d.
erratic transmission of nerve impulses.
 

 19. 

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is
a.
positively charged and contains less sodium.
b.
negatively charged and contains less sodium.
c.
positively charged and contains more sodium.
d.
negatively charged and contains more sodium.
 

 20. 

Choose the statement that is most correct about membrane potential.
a.
Voltage is measured by placing one electrode inside the membrane and another outside the membrane.
b.
Voltage is measured by placing one electrode on one end of the axon and another electrode on the other end.
c.
Voltage is measured by placing two electrodes on the exterior of the axon.
d.
Voltage is measured by placing one electrode on the axon and grounding the other electrode.
 

 21. 

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon
a.
the impulse would move to the axon terminal only.
b.
muscle contraction would occur.
c.
the impulse would spread bidirectionally.
d.
Both a and c are correct.
 

 22. 

Immediately after an action potential has peaked which cellular gates open?
a.
chloride
c.
calcium
b.
potassium
d.
sodium
 

 23. 

Potentially damaging stimuli that result in pain are selectively detected by
a.
interoceptors.
c.
nociceptors.
b.
photoreceptors.
d.
proprioceptors.
 

 24. 

Meissner's corpuscles
a.
are found primarily in connective tissue.
c.
are interoceptors.
b.
are anatomically unencapsulated.
d.
are mechanoreceptors.
 

 25. 

Which statement is true?
a.
Stimulus strength is encoded by action potential amplitude.
b.
Stimulus strength is encoded by action potential frequency.
c.
Receptor potentials are essentially the same as inhibitory postsynaptic potentials (IPSPs).
d.
Subthreshold receptor potentials become generator potentials.
 

 26. 

Which receptors adapt most slowly?
a.
smell receptors
c.
nociceptors
b.
pressure receptors
d.
touch receptors
 

 27. 

Axonal terminals at the neuromuscular junction
a.
contain synaptic vesicles filled with ACh.
b.
contain one bouton for each motor end plate.
c.
release mitochondria into the synaptic cleft.
d.
are stimulated to release their neurotransmitter by inhibitory postsynaptic potentials (IPSPs).
 

 28. 

Which of the following is not a result of parasympathetic stimulation?
a.
salivation
b.
dilation of the pupils
c.
increased peristalsis of the digestive viscera
d.
relaxation of the urethral sphincter
 
 
neuropracticetest1_files/i0310000.jpgFigure 1-1
 

 29. 

In figure 1-1 above, diagram ‘A’ would be considered negatively charged overall
a.
true
b.
false
 

 30. 

In figure 1-1 above, situation ‘C’ is ______ compared to ‘A’ and ‘B’
a.
depolarized
c.
hyperpolarized
b.
repolarized
 

 31. 

Which of the following is/are true about an action potential (choose all that apply)
a.
start at the axon hillock
b.
occur due to summation of graded potentials
c.
all action potentials have the same intensity
d.
none of the above are true about action potentials
 

 32. 

Which of the following are the correct order from superficial to deep
a.
perineurium, epineurium, endoneurium, neuron
b.
neuron, endoneurium, perineurium, epineurium
c.
epineurium, perineurium, endoneurium, neuron
d.
endoneurium, perineurium, epineurium, neuron
 

 33. 

Which of the following is not a property of nervous tissue
a.
long lifespan
c.
conducts impulses
b.
high metabolic rate
d.
these are all properties of nervous tissue
 

 34. 

Which of the following are support cells in the central nervous system
a.
schwann cells
c.
neuroglia
b.
myelin
d.
interneurons
 

 35. 

Which of the following neurotransmitters is involved in inflammation
a.
dopamine
c.
histamine
b.
GABA
d.
serotonin
 

 36. 

An organism such as a mosquito or tick that transmits disease would be called a
a.
pathogen
c.
transmitter
b.
vector
d.
spreader
 

Matching
 
 
neuropracticetest1_files/i0410000.jpg
Match the neuron part to its correct letter on the diagram above
a.
a
d.
d
b.
b
e.
s
c.
c
 

 37. 

axon terminals
 

 38. 

cell body
 

 39. 

myelin
 
 
Match the drug to its action in the brain
a.
alcohol
d.
heroin
b.
marijuana
e.
LSD
c.
cocaine
 

 40. 

Blocks dopamine reuptake pumps, prolonging dopamine’s effects
 

 41. 

Binds to opiate receptors, inhibits the inhibition of dopamine
 
 
Match the drug to its method of intake (choose all that apply)
a.
ingest
c.
inject
b.
inhale
d.
snort
 

 42. 

cocaine
 

 43. 

GHB and Rohypnol
 

Completion
Complete each sentence or statement.
 

 44. 

That part of the nervous system that is voluntary and conducts impulses from the CNS to the skeletal muscles is the ________ nervous system.
 

 

 45. 

The gap between Schwann cells in the peripheral system is called a(n) ________.
 

 

 46. 

________ potentials are short-lived, local changes in membrane potential that can be either depolarized or hyperpolarized.
 

 

 47. 

The perineurium defines the boundary of a ________.
 

 

 48. 

The parasympathetic division uses only ________ as a neurotransmitter in the postganglionic neurons.
 

 

 49. 

The sympathetic division is referred to as the ________ system.
 

 

Short Answer
 

 50. 

Imagine a neuron that has several hundred axonal knobs impinging on it. The majority of these axonal knobs are shown to be "firing." However, the neuron in question does not transmit an impulse. Give a valid explanation of why this could occur.
 

 51. 

What is the benefit of having the nerve supply of the diaphragm, which is located in the thoracic-lumbar area of the spinal cord, arise from cervical nerves?
 

 52. 

How does accommodation of muscle spindles figure in the importance of stretch routines as a warm-up for exercise?
 

 53. 

How is hypertension (high blood pressure) related to the ANS?
 

Case
 

 54. 

Mr. Smith staggered home after a long night at the local pub. While attempting to navigate the stairs, he passed out cold and lay all night with his right armpit straddling the staircase bannister. When he awoke the next morning, he had a severe headache, but what bothered him more was that he had no sensation in his right arm and hand. Explain what caused this symptom in his arm.
 

 55. 

Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. With what process does this interfere and what would be the consequence?
 

 56. 

While working in the emergency room you receive two patients who were in an automobile accident. One is dead on arrival, having suffered a transaction of the spinal cord at the level of C2. The other patient suffered a similar injury but at the level of C6 and is still alive. Explain briefly in terms of phrenic nerve origin and function why one injury was fatal while the other was not.
 

 57. 

Ralph sustained a leg injury in a bowling accident and had to use crutches. Unfortunately, he never took the time to learn how to use them properly. After two weeks of use, he noticed his fingers were becoming numb. Shortly, his arms were getting weaker and tingling. What could be his problem.
 

 58. 

Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated rapidly. When she found that the noise was only a car backfiring, she felt greatly relieved but her heart kept beating heavily for over half an hour. Why did this happen?
 

Essay
 

 59. 

Not a real question but...

The WebAnatomy site has excellent practice for this test - better than any questions I would make up. You should particularly concentrate on the following URL...

http://msjensen.cehd.umn.edu/Webanatomy/nervous/default.html (there are a lot of links here you can click - neuron, brain, spinal cord, action potential physiology)
 



 
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