Question 1

How are potassium and sodium transported across plasma membranes?

Accepted Answer

A)   By passive electrolyte channels
B)   By coupled channels
C)   By adenosine triphosphate enzyme (ATPase) 
D)   By diffusionE) B) and C)
F) A) and C)

Question 2

A patient with metastatic cancer would be expected to have alterations in extracellular matrix that include:

Accepted Answer

A)   decreased fibronectin.
B)   increased collagen.
C)   decreased elastin.
D)   increased glycoproteins.E) A) and D)
F) None of the above A

Question 3

At rest, the membrane potential is nearly the equilibrium potential for potassium. Why is potassium able to diffuse easily in and out of cells?

Accepted Answer

A)   Because potassium has a greater concentration in the intracellular fluid (ICF) 
B)   Because sodium has a greater concentration in the extracellular fluid (ECF) 
C)   Because the resting plasma membrane is more permeable to potassium
D)   Because there is an excess of anions inside the cellE) None of the above
F) B) and C)

Question 4

A patient who has diarrhea receives a hypertonic saline solution intravenously to replace the sodium and chloride lost in the stool. What effect will this fluid replacement have on cells?

Accepted Answer

A)   Cells will become hydrated.
B)   Cells will swell or burst.
C)   Cells will shrink.
D)   Cells will divide.E) A) and D)
F) All of the above

Question 5

A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of the genetic information be contained?

Accepted Answer

A)   Mitochondria
B)   Ribosome
C)   Nucleolus
D)   NucleusE) B) and D)
F) A) and B)

Question 6

The phase of catabolism during which ATP production is highest is:

Accepted Answer

A)   digestion.
B)   glycolysis.
C)   oxidation.
D)   citric acid cycle.E) C) and D)
F) A) and D)

Question 7

In cirrhosis, how does cholesterol alter the fluidity of the plasma membrane of erythrocytes?

Accepted Answer

A)   Cholesterol decreases the membrane fluidity of the erythrocyte, which reduces its ability to carry oxygen.
B)   Cholesterol decreases the membrane fluidity of erythrocytes, which reduces its ability to carry hemoglobin.
C)   Cholesterol increases the membrane fluidity of erythrocytes, which allows binding of excess glucose.
D)   Cholesterol increases the membrane fluidity of erythrocytes, which prolongs its life span beyond 120 days.E) C) and D)
F) B) and C)

Question 8

A tissue capillary bed has a hydrostatic pressure of 25 mm Hg and an oncotic pressure of 10 mm Hg. The filtration pressure is _____ mm Hg.

Accepted Answer

A)   5
B)   10
C)   15
D)   20E) None of the above
F) B) and C)

Question 9

The three phases of cellular catabolism are:

Accepted Answer

A)   digestion, glycolysis and oxidation, and the citric acid cycle.
B)   diffusion, osmosis, and mediated transport.
C)   S phase, G phase, and M phase.
D)   metabolic absorption, respiration, and excretion.E) All of the above
F) A) and D)

Question 10

The phase during the cell cycle where nuclear and cytoplasmic division occurs is called:

Accepted Answer

A)   G1.
B)   S.
C)   M.
D)   G2.E) A) and B)
F) B) and C)

Question 11

In cellular metabolism, each enzyme has a high affinity for a:

Accepted Answer

A)   solute.
B)   substrate.
C)   receptor.
D)   ribosome.E) A) and B)
F) C) and D)

Question 12

The movement of small, electrically uncharged molecules through a semipermeable barrier is an example of:

Accepted Answer

A)   osmosis.
B)   diffusion.
C)   hydrostatic pressure.
D)   active transport.E) A) and D)
F) B) and D)

Question 13

How is the transport of glucose from the blood to the cell accomplished?

Accepted Answer

A)   By active-mediated transport (active transport) 
B)   By active diffusion
C)   By passive osmosis
D)   By passive-mediated transport (facilitated diffusion) E) C) and D)
F) B) and D)

Question 14

The process during which lysosomal enzymes can be released to degrade engulfed particles is referred to as:

Accepted Answer

A)   endocytosis.
B)   pinocytosis.
C)   phagocytosis.
D)   exocytosis.E) All of the above
F) A) and B)

Question 15

A biopsy of the lung bronchi revealed ciliated epithelial cells that are capable of secretion and absorption. These cells are called:

Accepted Answer

A)   simple columnar epithelium.
B)   ciliated simple columnar epithelium.
C)   stratified columnar epithelium.
D)   pseudostratified ciliated columnar epithelium.E) A) and D)
F) A) and C) B

Question 16

The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an example of which of the following types of transport?

Accepted Answer

A)   Active mediated transport
B)   Uniport
C)   Antiport
D)   SymportE) A) and B)
F) A) and C) D

Question 17

The movement of fluid across the arterial end of capillary membranes into the interstitial fluid surrounding the capillary is an example of which process of fluid movement?

Accepted Answer

A)   Hydrostatic pressure
B)   Osmosis
C)   Diffusion
D)   Active transportE) None of the above
F) All of the above

Question 18

A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continued muscle performance?

Accepted Answer

A)   Electron-transport chain
B)   Aerobic glycolysis
C)   Anaerobic glycolysis
D)   Oxidative phosphorylationE) None of the above
F) A) and C)

Question 19

A cell is isolated for microscopy. It is observed to have supercoiled DNA with histones. Which of the following would also be observed?

Accepted Answer

A)   Single circular chromosome
B)   Nucleus
C)   Freely floating nuclear material
D)   No organellesE) None of the above
F) A) and B)

Question 20

Which form of cell communication is used to communicate with other cells in direct physical contact?

Accepted Answer

A)   Cell junction
B)   Gap junction
C)   Desmosomes
D)   Tight junctionsE) A) and D)
F) A) and B)

Exam 1: Cellular Biology

How are potassium and sodium transported across plasma membranes?

Correct AnswerverifiedShow Answer

A patient with metastatic cancer would be expected to have alterations in extracellular matrix that include:

Correct AnswerverifiedA

At rest, the membrane potential is nearly the equilibrium potential for potassium. Why is potassium able to diffuse easily in and out of cells?

Correct AnswerverifiedShow Answer

A patient who has diarrhea receives a hypertonic saline solution intravenously to replace the sodium and chloride lost in the stool. What effect will this fluid replacement have on cells?

Correct AnswerverifiedShow Answer

A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of the genetic information be contained?

Correct AnswerverifiedShow Answer

The phase of catabolism during which ATP production is highest is:

Correct AnswerverifiedShow Answer

In cirrhosis, how does cholesterol alter the fluidity of the plasma membrane of erythrocytes?

Correct AnswerverifiedShow Answer

A tissue capillary bed has a hydrostatic pressure of 25 mm Hg and an oncotic pressure of 10 mm Hg. The filtration pressure is _____ mm Hg.

Correct AnswerverifiedShow Answer

The three phases of cellular catabolism are:

Correct AnswerverifiedShow Answer

The phase during the cell cycle where nuclear and cytoplasmic division occurs is called:

Correct AnswerverifiedShow Answer

In cellular metabolism, each enzyme has a high affinity for a:

Correct AnswerverifiedShow Answer

The movement of small, electrically uncharged molecules through a semipermeable barrier is an example of:

Correct AnswerverifiedShow Answer

How is the transport of glucose from the blood to the cell accomplished?

Correct AnswerverifiedShow Answer

The process during which lysosomal enzymes can be released to degrade engulfed particles is referred to as:

Correct AnswerverifiedShow Answer

A biopsy of the lung bronchi revealed ciliated epithelial cells that are capable of secretion and absorption. These cells are called:

Correct AnswerverifiedB

The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an example of which of the following types of transport?

Correct AnswerverifiedD

The movement of fluid across the arterial end of capillary membranes into the interstitial fluid surrounding the capillary is an example of which process of fluid movement?

Correct AnswerverifiedShow Answer

A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continued muscle performance?

Correct AnswerverifiedShow Answer

A cell is isolated for microscopy. It is observed to have supercoiled DNA with histones. Which of the following would also be observed?

Correct AnswerverifiedShow Answer

Which form of cell communication is used to communicate with other cells in direct physical contact?

Correct AnswerverifiedShow Answer

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A

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B

The ion transporter that moves Na⁺ and Ca²⁺ simultaneously in the same direction is an example of which of the following types of transport?

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D

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