Test Bank for Berne & Levy Physiology 8th Edition by Koeppen & Stanton | Chapters 1–44 Verified Questions & Answers 2025

BERNE AND LEVY PHYSIOLOGY 7TH
EDITION KOEPPEN ALL CHAPTERS
LATEST & UPDATED 2024 A+


Chapter6901:69Principles69of69Cell69Function69Test69Bank
Multiple69Choices


1. The69subcellular69structure69that69degrades69proteins69is69called69the:


A. Tight69junction
B. Mitochondria
C. Lysosome
D. Plasma69membrane
E. Ribosome
69ANS:69C




2. An69experiment69is69done69to69measure69the69uptake69of69an69amino69acid69into69a69cell.6
9The69following69data69are69obtained:




If69Na+69is69removed69from69the69extracellular69bathing69solution,69or69if69a69drug69is69added69th
at69prevents69the69cell69from69making69adenosine69triphosphate69(ATP),69the69uptake69of69amino
69acid69into69the69cell69is69markedly69reduced.69According69to69this69information,69which69of69the

69followingmechanisms69is69probably69responsible69for69the69transport69of69the69amino69acid69int


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,o69the69cell?




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,A. Passive69diffusion69through69the69lipid69bilayer
B. Uniporter
C. Transport69ATPase
D. Na+69symporter
E. Na+69antiporter69ANS:69D


3. A69membrane69permeable69by69only69Na+69separates69two69compartments69c
ontaining69Na2SO4,shown69as69follows:




Electrodes69are69placed69in69both69compartments,69and69a69voltage69is69applied69(that69of69com
partment69A69is69held69at69069mV).69What69voltage69applied69to69compartment69B69would69resul
tin69no69net69movement69of69Na+69across69the69membrane69separating69the69compartments?


A. –6069mV
B. –3069mV
C. 069mV
D. +3069mV
E. +6069mV69ANS:69E


4. The69resting69membrane69potentNial69oRf69aIcellGis69–
B85.CmV.69The69intracellular69and69extracellular69concentrations69of69several69ions69are
69indicated69in69the69following69table,69as69is69the69calculated

Nernst69equilibrium69potential69(Ei)69for69each69of69these69ions:

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, Ion Concentration
Inside69Cell
Concentration
69Outside69Cell Ei
Na+ 1269mEq/L 14569mEq/L 6669mV
K+ 15069mEq/L 469mEq/L –9669mV
Cl– 3069mEq/L 10569mEq/L –3369mV
Ca++6 9 6 9 0.000169mmol/dL 169mmol/dL 12269mV


The69membrane69has69channels69for69Na+,69K+,69Cl–
,69and69Ca++.69The69conductance69of69the69membrane69is69the69greatest69for69which69ion?


A. Na+
B. K+
C. Cl–
D. Ca++69ANS:69B


5. A69cell69contains69the69following69membrane69transporters:




Na+69channelK+69channel69Na+,K+-ATPase


The69resting69membrane69voltage69of69the69cell69is69–


8069mV,69and69the69intracellular69and69extracellular69ion69concentrations69are69as69follow


s:


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