CBNS 120 MIDTERM 1 QUESTIONS WITH VERIFIED ANSWERS

CBNS 120 MIDTERM 1 QUESTIONS WITH VERIFIED
ANSWERS


Correct 45

Incorrect 00




1 of 45

Term



In the squid axon experiments, the early inward current can be isolated
by:


a.) Treatment with TTX
b.) Treatment with alpha-bungarotoxin
c.) Treatment with TEA
d.) Stepping to the Na equilibrium potential



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c.) The Na channel inactivation
c.) Treatment with TEA
particle




c.) The SERCA pump C.) Slows inactivation

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2 of 45

Term



The following are specific blockers of the Na/K Pump: (Choose all that
are correct)


a.) tetrodotoxin
b.) ouabain
c.) alpha-bungarotoxin
d.) digoxin



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b; c; d b;d




E. (B) and (C) only b; d


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3 of 45

Term



Na current during the action potential decreases due to:

,a.) decreased driving force
b.) increased driving force
c.) inactivation
d.) All of the above
e.) A and C only


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E.) A and B only e.) A and C only




E.) B and C E.) B and C only


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4 of 45

Term



Myocardial cells have long duration action potentials because of:


a.) gNa
b.) gK
c.) gCa
d.) gCl



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E.) B and C c.) gCa

, b;c;d;a rectification


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5 of 45

Definition



ions



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Permeability is the ability of the Cajal used the [_____ ] stain to prove
membrane to conduct _____ _ . the [ _____ ] Doctrine.




Permeability indicates the presence
Categories of ion channels include
of ____ , while conductance requires
________, _________, and ______ _.
_______ and ____ _.


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6 of 45

Term



Secondary transporters derive their energy from:


A. ATP