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Biology Chapter 13 Nervous System Questions With Complete Solutions
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Biology Chapter 13 Nervous System Questions With Complete Solutions
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Biology Chapter 13 Nervous System Questions WithComplete Solutions
_______ is a disease of the myelin sheath.
A) Leprosy
B) Alzheimer disease
C) Multiple sclerosis
D) Polio Correct Answers C) Multiple sclerosis
_________ is the summing up of excitatory and inhibitory
signals.
A) Acting potential
B) Reticular formation
C) Neurotransmission
D) Synapse
E) Integration Correct Answers E) Integration
Integration is the summing up of excitatory and inhibitory
signals.
__________ is the space that separates neurons.
a. The cell body
b. The cerebrum
c. The myelin sheath
d. The synapse Correct Answers d. The synapse
1. Oligodendrocytes are located in the _____.
A. PNS
B. CNS Correct Answers B. CNS
,Oligodendrocytes are the myelinating cells of the central
nervous system (CNS).
10. Which of the following is not considered a catecholamine?
A. Dopamine
B. Norepinephrine
C. Serotonin
D. Epinephrine Correct Answers In the human body, the most
abundant catecholamines are epinephrine (adrenaline),
norepinephrine (noradrenaline) and dopamine, all of which are
produced from phenylalanine and tyrosine. Release of the
hormones epinephrine and norepinephrine from the adrenal
medulla of the adrenal glands is part of the fight-or-flight
C. Serotonin
11. Excessive polarization due to GABA is created due to the
opening of ____ channels.
A. Ca++
B. Cl-
C. K+
D. Na+ Correct Answers B. C1-
As an inhibitory neutrotransmitter, GABA binds to both
ionotropic and metabotropic receptors, causing
hyperpolarization by opening Cl- ion channels
12. Valium has an effect on ____ to inhibit neural transmission.
A. Epinephrine
B. Norepinephrine
C. GABA
D. Dopamine Correct Answers C - GABA:
,Gamma-Amino Butyric acid (GABA) is an amino acid which
acts as a neurotransmitter in the central nervous system. It
inhibits nerve transmission in the brain, calming nervous
activity. As a supplement it is sold and promoted for these
neurotransmitter effects as a natural tranquilizer. Valium=
calming
13. The drug ____ blocks the reuptake of serotonin into
presynaptic axons.
A. Prozac
B. Valium
C. Xanax
D. Deprenyl Correct Answers Prozac is a selective serotonin
reuptake inhibitor (SSRI), which blocks re-uptake of serotonin
by the presynaptic cell.
A. PROZAC
14. Which of the following toxins blocks Sodium Channels?
A. Srychnine
B. Neostigmine
C. Tetrodotoxin
D. Curare Correct Answers C. TETRODOTOXIN: Its
mechanism of action, selective blocking of the sodium channel
15. Clostridium botulinum releases this enzyme that destroys
peptide bonds.
A. Amylase
B. Endopeptidases
C. Exopeptidases
D. Protein kinase Correct Answers B. Endopeptidases -
, endopeptidases is an enzyme that breaks peptide bonds other
than terminal ones in a peptide chain.
16. Multiple sclerosis is a disease that attacks the _______ of
neurons in the CNS.
A. Myelin sheaths
B. Axon terminals
C. Sodium channels
D. Nicotinic receptors Correct Answers A. Myelin sheaths
17. Which of the following is not considered a type of synapse?
A. Dendrodendritic
B. Axosomatic
C. Axoaxonic
D. Denoaxonic Correct Answers D. Denoaxonic
18. The progression of a nerve impulse with the nodes of
Ranvier is called _______.
A. Saltatory conduction
B. Transmission
C. Unmyelinated conduction
D. Relative conduction Correct Answers A. SALATORY
CONDUCTION - Saltatory conduction is the propagation of
action potentials along myelinated axons from one node of
Ranvier to the next node, increasing the conduction velocity of
action potentials without needing to increase the diameter of an
axon.
19. Supporting cells located within the CNS are collectively
called _____.
A. Neuroglia
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