Western University PHYSIOLOGY 2130 Final Exam - Practice Quiz With Answer Key

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Final Exam Practice Quiz




Part 1




1
Which of the following is TRUE about facilitated diffusion?
A. Molecules are moved against their concentration gradient.

B. The type of molecule that is moved is non-specific.

C. Has unlimited capacity.

D. Can be inhibited by chemically similar molecules.

Answer Point Value: 1.0 points
Answer Key: D



7
The rate of diffusion through a protein channel is affected by all of the following
EXCEPT:
A. the size of the molecule

B. the charge of the molecule

C. the electrical and chemical gradients

D. the amount of ATP available

Answer Point Value: 1.0 points
Answer Key: D

,6
Which of the following statements about chemical concentrations is true?
A. The Na+ concentration in the intracellular and extracellular fluid is
virtually the same.

B. There is more Cl- in the intracellular fluid compared to the extracellular
fluid.

C. There is more K+ in the intracellular fluid compared to the extracellular
fluid.

D. There is more Ca+2 in the intracellular fluid compared to the extracellular
fluid.

Answer Point Value: 1.0 points
Answer Key: C



4
Which of the following statements concerning concentration gradients is correct?
A. The Na+ concentration gradient will cause the movement of Na+ into the
cell.

B. The concentration gradient for K+ will cause the movement of K+ into the
cell.

C. The Cl- concentration gradient will cause the movement of Cl- out of the
cell.

D. The concentration gradient for Ca+2 will cause the movement of Ca+2
out of the cell.

Answer Point Value: 1.0 points
Answer Key: A

,5
Which of the following statements concerning the distribution of ions in the body
is true?
A. Cl- concentrations are higher outside of the cell compared to the inside of
the cell.

B. Na+ concentrations are higher inside the cell compared to the outside of
the cell.

C. Protein concentrations are higher outside of the cell compared to the
inside of the cell.

D. K+ concentrations are higher outside of the cell compared to the inside of
the cell.

Answer Point Value: 1.0 points
Answer Key: A



3
Which of the following is NOT the same between facilitated diffusion and active
transport?
A. Both require ATP.

B. Both can be competitively inhibited.

C. Both show chemical specificity.

D. Both transport mechanisms can be saturated.

Answer Point Value: 1.0 points
Answer Key: A



2
Which is NOT a factor in the diffusion of ions/molecules?
A. The charge of the ion/molecule.

B. The size of the ion/molecule.

C. The biological importance of the ion/molecule.

D. The number of channels.

Answer Point Value: 1.0 points
Answer Key: C

, Part 2




8
Which of the following solutions will cause a red blood cell, when placed in that
solution, to shrivel? (assume the solvent is 1L of water)
A. 100 mM NaCl

B. 50 mM KCl

C. 150 mM NaCl

D. 150 mM CaCl2

Answer Point Value: 1.0 points
Answer Key: D



9
Which of the following solutions is hypertonic compared to a human cell? (assume
the solvent is 1L of water)
A. 150 mM NaCl

B. 100 mM NaCl

C. 50 mM KCl

D. 150 mM CaCl2

Answer Point Value: 1.0 points
Answer Key: D



10
Which of the following solutions will cause a red blood cell, when placed in that
solution, to swell? (assume the solvent is 1L of water)
A. 100 mM NaCl

B. 300 mM NaCl

C. 100 mM CaCl2

D. 150 mM KCl

Answer Point Value: 1.0 points
Answer Key: A