Test Bank for Berne And Levy Physiology 7th Edition
by Koeppen
All Chapters (1-44) |Expert Verified Answers | Graded A+
1|Page
, Chapter 01: Principles of Cell Function
Multiple Choice
1. The subcellular structure that degrades proteins is called the:
A. Tight junction
B. Mitochondria
C. Lysosome
D. Plasma membrane
E. Ribosome
ANSWER: C
2. An experiment is done to measure the uptake of an amino acid into a cell. The
following data are obtained:
If Na+ is removed from the extracellular bathing solution, or if a drug is added that
prevents the cell from making adenosine triphosphate (ATP), the uptake of amino acid
into the cell is markedly reduced. According to this information, which of the
followingmechanisms is probably responsible for the transport of the amino acid into the
cell?
A. Passive diffusion through the lipid bilayer
B. Uniporter
C. Transport ATPase
D. Na+ symporter
E. Na+
antiporter
ANSWER: D
3. A membrane permeable by only Na+ separates two compartments
containing Na2SO4,shown as follows:
2|Page
, Electrodes are placed in both compartments, and a voltage is applied (that of
compartment A is held at 0 mV). What voltage applied to compartment B would resultin
no net movement of Na+ across the membrane separating the compartments?
A.–60 mV
B.–30 mV
C.0 mV
D. +30 mV
E. +60 mV
ANSWER: E
4. The resting membrane potentl of a c e l l is –B85.mCV. The intracellular and extracellular
concentrations of several ions are indicated in the following table, as is the
calculated
Nernst equilibrium potential (Ei) for each of these ions:
Ion Concentration Concentration Ei
Inside Cell Outside Cell
Na+ 12 mEq/L 145 mEq/L 66 mV
K+ 150 mEq/L 4 mEq/L –96 mV
Cl– 30 mEq/L 105 mEq/L –33 mV
Ca++ 0.0001 mmol/dL 1 mmol/dL 122 mV
The membrane has channels for Na+, K+, Cl–, and Ca++. The conductance of
the membrane is the greatest for which ion?
A. Na+
B. K+
C. Cl–
D. Ca++
ANSW
ER: B
5. A cell contains the following membrane transporters:
Na+ channelK+
channel Na+,K+-
ATPase
The resting membrane voltage of the cell is –80 mV, and the intracellular and
3|Page
, extracellular ion concentrations are as follows:
Ion Intracellular Extracellular
Concentration Concentration
Na+ 10 mEq/L 145 mEq/L
K+ 120 mEq/L 4 mEq/L
The cell is treated with a drug to inhibit the Na+,K+-ATPase. What would be the effect ofthis
drug on the following parameters?
Intracellular [Na+] Intracellular [K+] Cell Volume Membrane Voltage
A. Decrease Decrease Decrease Depolarize
B. Increase Decrease Increase Depolarize
C. Increase Increase Increase No change
D. Decrease Increase Decrease Hyperpolarize
E. Increase Increase Decrease Hyperpolarize
ANSWER: B
6. Which of the labeled proteins (shaded) is attached to the membrane
by a glycosylphosphatidylinositol (GPI) anchor?
ANSWER: E
7. A cell has channels for Na+, K+, and Cl– in its plasma membrane. The resting
membrane potential is –60 mV (cell interior negative). The intracellular and
extracellular concentrations for these ions, as well as the calculated Nernst
potentials, are listed as follows:
4|Page
by Koeppen
All Chapters (1-44) |Expert Verified Answers | Graded A+
1|Page
, Chapter 01: Principles of Cell Function
Multiple Choice
1. The subcellular structure that degrades proteins is called the:
A. Tight junction
B. Mitochondria
C. Lysosome
D. Plasma membrane
E. Ribosome
ANSWER: C
2. An experiment is done to measure the uptake of an amino acid into a cell. The
following data are obtained:
If Na+ is removed from the extracellular bathing solution, or if a drug is added that
prevents the cell from making adenosine triphosphate (ATP), the uptake of amino acid
into the cell is markedly reduced. According to this information, which of the
followingmechanisms is probably responsible for the transport of the amino acid into the
cell?
A. Passive diffusion through the lipid bilayer
B. Uniporter
C. Transport ATPase
D. Na+ symporter
E. Na+
antiporter
ANSWER: D
3. A membrane permeable by only Na+ separates two compartments
containing Na2SO4,shown as follows:
2|Page
, Electrodes are placed in both compartments, and a voltage is applied (that of
compartment A is held at 0 mV). What voltage applied to compartment B would resultin
no net movement of Na+ across the membrane separating the compartments?
A.–60 mV
B.–30 mV
C.0 mV
D. +30 mV
E. +60 mV
ANSWER: E
4. The resting membrane potentl of a c e l l is –B85.mCV. The intracellular and extracellular
concentrations of several ions are indicated in the following table, as is the
calculated
Nernst equilibrium potential (Ei) for each of these ions:
Ion Concentration Concentration Ei
Inside Cell Outside Cell
Na+ 12 mEq/L 145 mEq/L 66 mV
K+ 150 mEq/L 4 mEq/L –96 mV
Cl– 30 mEq/L 105 mEq/L –33 mV
Ca++ 0.0001 mmol/dL 1 mmol/dL 122 mV
The membrane has channels for Na+, K+, Cl–, and Ca++. The conductance of
the membrane is the greatest for which ion?
A. Na+
B. K+
C. Cl–
D. Ca++
ANSW
ER: B
5. A cell contains the following membrane transporters:
Na+ channelK+
channel Na+,K+-
ATPase
The resting membrane voltage of the cell is –80 mV, and the intracellular and
3|Page
, extracellular ion concentrations are as follows:
Ion Intracellular Extracellular
Concentration Concentration
Na+ 10 mEq/L 145 mEq/L
K+ 120 mEq/L 4 mEq/L
The cell is treated with a drug to inhibit the Na+,K+-ATPase. What would be the effect ofthis
drug on the following parameters?
Intracellular [Na+] Intracellular [K+] Cell Volume Membrane Voltage
A. Decrease Decrease Decrease Depolarize
B. Increase Decrease Increase Depolarize
C. Increase Increase Increase No change
D. Decrease Increase Decrease Hyperpolarize
E. Increase Increase Decrease Hyperpolarize
ANSWER: B
6. Which of the labeled proteins (shaded) is attached to the membrane
by a glycosylphosphatidylinositol (GPI) anchor?
ANSWER: E
7. A cell has channels for Na+, K+, and Cl– in its plasma membrane. The resting
membrane potential is –60 mV (cell interior negative). The intracellular and
extracellular concentrations for these ions, as well as the calculated Nernst
potentials, are listed as follows:
4|Page
