PNB Exam IV Questions and answers
rated A+ latest update
D. the intracellular level of cGMP decreases. - ANS ✔✔When a rod cell in the eye is stimulated
by light:
A. the cell membrane become depolarized.
B. the inactive form of retinal associates with bleached opsin.
C. transducing activity decreases.
D. the intracellular level of cGMP decreases.
E. more neurotransmitters are released
A. Cochlear duct (scala media); K+ - ANS ✔✔Scala ____ is filled with fluid that has an
abnormally high _____.
A. Cochlear duct (scala media); K+
B. Tympanic duct (scala tympani); K+
C. Vestibular duct (scala vestibular); Na+
D. Corti duct (scala corti); Na+
A. Cochlear duct (scala media) - ANS ✔✔The organ of corti is located in the _____.
A. Cochlear duct (scala media)
B. Tympanic duct (scala tympani)
C. Vestibular duct (scala vestibular)
D. Corti duct (scala corti)
,A. hair cell depolarized due to a K+ and Ca2+ influx. - ANS ✔✔When the stereocilia of the hair
cell are displaced toward the kinocilium,
A. hair cell depolarized due to a K+ and Ca2+ influx.
B. hair cell hyperpolarized due to a K+ and Ca2+ efflux.
C. hair cell depolarized due to a Na+ infflux.
D. hair cell hyperpolarized due to a Na+ efflux.
E. No change in membrane potential.
C) Dominant hand - ANS ✔✔People are able to generate faster simple tapping movement using
their _____
A) Left hand
B) Right hand
C) Dominant hand
D) Non-dominant hand
B) Right hand - ANS ✔✔People are able to generate faster sequential movement using their
_____
A) Left hand
B) Right hand
C) Dominant hand
D) Non-dominant hand
A. Movement is more inhibited - ANS ✔✔What will happen when an indirect pathway is further
activated?
A. Movement is more inhibited
B. Movement is more potentiated
, C) sympathetic activation - ANS ✔✔Phenelzine is a common MAO inhibitor that has been used
to treat depression. Taking Phenelzine will cause a(n)
A) parasympathetic activation
B) parasympathetic inhibition
C) sympathetic activation
D) sympathetic inhibition
E) activation of both divisions
A.The firing of AP in Preganglionic Neurons - ANS ✔✔Hexamathonium is a nicotinic receptor
antagonist that was investigated for use in treating a wide variety of ANS related disorders.
Which of the following events would not be affected by this drug?
A.The firing of AP in Preganglionic Neurons
B. The release of Epinephrine from Adrenal Medulla
C. The release of Epinephrine from post-ganglionic neurons in the sympathetic nervous system
D. The voluntary contraction of the biceps
-Postganglionic Sympathetic Neurons "Mass Discharge"
-Release of EPINEPHRINE from Adrenal Medulla - ANS ✔✔The fight or flight response is an
example of what and results in what?
Adrenergic receptors define the actions of the E - ANS ✔✔Why can FF have opposite effects on
constricting GI tract vs dilation of skeletal muscles?
rated A+ latest update
D. the intracellular level of cGMP decreases. - ANS ✔✔When a rod cell in the eye is stimulated
by light:
A. the cell membrane become depolarized.
B. the inactive form of retinal associates with bleached opsin.
C. transducing activity decreases.
D. the intracellular level of cGMP decreases.
E. more neurotransmitters are released
A. Cochlear duct (scala media); K+ - ANS ✔✔Scala ____ is filled with fluid that has an
abnormally high _____.
A. Cochlear duct (scala media); K+
B. Tympanic duct (scala tympani); K+
C. Vestibular duct (scala vestibular); Na+
D. Corti duct (scala corti); Na+
A. Cochlear duct (scala media) - ANS ✔✔The organ of corti is located in the _____.
A. Cochlear duct (scala media)
B. Tympanic duct (scala tympani)
C. Vestibular duct (scala vestibular)
D. Corti duct (scala corti)
,A. hair cell depolarized due to a K+ and Ca2+ influx. - ANS ✔✔When the stereocilia of the hair
cell are displaced toward the kinocilium,
A. hair cell depolarized due to a K+ and Ca2+ influx.
B. hair cell hyperpolarized due to a K+ and Ca2+ efflux.
C. hair cell depolarized due to a Na+ infflux.
D. hair cell hyperpolarized due to a Na+ efflux.
E. No change in membrane potential.
C) Dominant hand - ANS ✔✔People are able to generate faster simple tapping movement using
their _____
A) Left hand
B) Right hand
C) Dominant hand
D) Non-dominant hand
B) Right hand - ANS ✔✔People are able to generate faster sequential movement using their
_____
A) Left hand
B) Right hand
C) Dominant hand
D) Non-dominant hand
A. Movement is more inhibited - ANS ✔✔What will happen when an indirect pathway is further
activated?
A. Movement is more inhibited
B. Movement is more potentiated
, C) sympathetic activation - ANS ✔✔Phenelzine is a common MAO inhibitor that has been used
to treat depression. Taking Phenelzine will cause a(n)
A) parasympathetic activation
B) parasympathetic inhibition
C) sympathetic activation
D) sympathetic inhibition
E) activation of both divisions
A.The firing of AP in Preganglionic Neurons - ANS ✔✔Hexamathonium is a nicotinic receptor
antagonist that was investigated for use in treating a wide variety of ANS related disorders.
Which of the following events would not be affected by this drug?
A.The firing of AP in Preganglionic Neurons
B. The release of Epinephrine from Adrenal Medulla
C. The release of Epinephrine from post-ganglionic neurons in the sympathetic nervous system
D. The voluntary contraction of the biceps
-Postganglionic Sympathetic Neurons "Mass Discharge"
-Release of EPINEPHRINE from Adrenal Medulla - ANS ✔✔The fight or flight response is an
example of what and results in what?
Adrenergic receptors define the actions of the E - ANS ✔✔Why can FF have opposite effects on
constricting GI tract vs dilation of skeletal muscles?
