Download Chapter 2A Practice Test

"2A"
-Practtee Exam
Name
Class Period
L
An axon is:
A) a ceil that serves as the basic building block of the nervous system'
B) a 1a1rer of fatty tissue that encases the fibers of many neurons.
Ci * antagonist molecule that blocks neurotransmitter receptor sites'
Oj tire extJnsion of a neuron that carries messages away from the ce1l body
E) a junction between
a sending and receiving neuron
a srngle
transmitting sensory information to the brain, an eiectncal signal within
neuron traveis from the:
A) ceil body to.the axon to the dendrites'
B) dendntes to the axon to the ce11 body'
C) axon to the cell body to the dendntes'
D) dendntes to the cell body to lhe axon'
E) axon to the dendntes to the cell body'
2.
I.:r
3. The speed, at which a neural rmpulse travels
A)
B)
C)
D)
E)
4.
A)
B)
C)
D)
is increased when the axon ts encased by
a(n):
association area.
myelin sheath.
endocnne giand.
glial cell
spaptrc vesicle.
will not affect the
Increasing excitatory signals above the threshold for neural activation
is:
intensrty of an action potential. This indicates that a neuton's reaction
inhibited by the mYehn sheath.
delayed by the refractory Penod.
an all-or-none resPonse.
dependent on neurotransmitter molecules'
5. A syeapse is a(n):
A) chemical
messenger that triggers muscle contractions'
B) automatic response to sensory input.
C) neurai newvork.
D) .lunction between a sending neuron and a receiving neulon.
E) neural cable containrng many axons-
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6.
Reuptake refers to the:
movement of neurotransmitter molecules across a synaptic gap.
binding of neurotransmifter molecules to d.endntic receptor siies.
inflow of partialiy charged ions through an axon membrane.
reabsorption of excess neurotransmitter molecules by a send,ing nerrlon.
A)
B)
c)
D)
7.
A)
B)
C)
D)
Schizophrenia is most closely linked
8' Botulin poisoning
A)
B)
C)
D)
with excess receptor activity for the
neurotransmifter:
dopamine.
eprnephnne.
acetylchoiine.
serotonin.
or:
endorphrns.
from rmproperly canned food, causes paraiysis by blocking the release
epinephrine.
acetyicholine.
dopamine.
9. Endoryhins
are:
A) neurotransmitters.
B) sex hormones.
C) endocnne giands.
D) morphine antagonists.
10. in order for you to experience the pain of a sprained ankle,
messages from your ankle to your central nervous system.
A) the limbic system
must first relay
B)
interneurons
C) the reticular formatron
D) motor neurons
E) sensor;/ neurons
I 1.. The vast majorify of cells
A)
B)
C)
D)
rnterneurons.
moLor neurons.
sensoryneurons.
neurotransmitters.
in the body's information-processing system
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are:
12, The parasyrnpathetic nervous system
digestion and
heartbeat.
A) acceierates; decelerates
B) decelerates; accelerates
C)
D)
accelerates, accelerates
decelerates; deceierates
13. The knee-jerk reflex is controlled by interneurons in the:
A) limbic system.
B)
C)
D)
spinal cord.
brainstem,
cerebellum.
14. The endocrine system consists of:
A) glial cells.
B) neural networks.
C) intemeurons.
D) glands,
15. Endocrine glands secrete hormones directly into:
A) synaptic gaps
B) the bloodstream.
C) the iimbic system.
D) sensoryneurons.
E) interneurons.
16. At the
Mrs. LaBlanc was less than 4 feet tall. Her short stature was probabiy
influenced by the lack of a growth hormone produced by the:
age of 22,
A) pancreas.
B) thyroid
C) adrenal gland.
D) pituitary gland.
E) hypothalamus.
17. The'axons of certain neurons are covered by a layer of fatty tissue that helps speed
neural transmission. This tissue is:
A) the glia.
B) the myelin sheath.
C) acefylcholine.
D) an endorphin.
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18. During an action potential, the ions are:
A). Polarized , as the atoms have only positive charges
B). Depolarized, as the atoms have neutral charges.
C). Polarized as the atoms have positive and negative charges
D). Depolarized as the atoms have either positive or negative charges.
19. The neurotransmitrer acetylcholine (ACjr) is most likeIy to be found:
A) at the junction befween sensory neurons and muscie fibers
B) at the junctron between motor neurolls and,muscle fibers.
C) at junctions between intenteurons.
D) in all of the above locations.
20. The pain of heroin withdrawal may be attributable to the fact
that:
of heroin the brain ceases production of endorphins.
of heroin the brain ceases production of all neurotransmittersdunng withdrawai the brain's production of all neurotransmitters is greatly increased
heroin destroys endoqphin receptors in the brain'
A) under the influence
B) under the influence
C)
D)
21. Parkinson's
A)
B)
C)
D)
disease involves:
the death of nerve cells that produce a vitai neurotransmitter.
impaired function in the nght hemisphere only.
impaired functron in the lefl hemisphere oniy
excess production of the neurotransmitters dopamine and acetylchohne.
22. Eprnephrine
and norepinephnne are
that are released by the
gland
A) neurotransmitters; pituitary
B) honnones; piruitary
C) neurotransmitters; adrenal
D) honnones; adrenal
E) hormones; thyr,oid
23. Drugs that block the reuptake of serotonin will thereby increase the concentration of
A)
B)
C)
D)
serotonin molecules in the:
axon terminals.
syeraptic gaps.
glial celis
endocnne giands
24. In stressful situations, the sympathetic nervous system
circulatory system and
A) contracts; dilates
B) dilates; contracts
C) contracts; contracts
D) dilates, dilates
25 Which of the following
A) serotonin
B) acetylchoiine
C)
D)
norepinephnne
dopamine
the arteries of the
the pupils of the eyes.
chemical rnessengers is both a neurotransmitter and a honnone?