Question 1

The rate of diffusion is influenced by

Accepted Answer

A)  the concentration gradient.
B)  membrane permeability.
C)  membrane surface area.
D)  All of these choices are correct.E) B) and C)
F) A) and D)

Question 2

Gas exchange between the cells and extracellular fluid utilizes active transport.

Accepted Answer

A) True 
 B)False

Question 3

80% of the extracellular fluid is termed interstitial fluid.

Accepted Answer

A) True 
 B)False

Question 4

A 0.5M glucose (molecular weight = 180g) contains ____________ grams of glucose per liter.

Accepted Answer

A)  90
B)  180
C)  6.02* 1023
D)  360E) C) and D)
F) A) and B)

Question 5

One mole of solute per liter depresses the freezing point of water by -1.86$\circ$C.

Accepted Answer

A) True 
 B)False

Question 6

Glucose transported via the GLUT carrier is characterized as

Accepted Answer

A)  active transport.
B)  passive transport.
C)  co-transport.
D)  receptor-mediated endocytosis.E) A) and D)
F) B) and D)

Question 7

Poisoning the Na+/K+ pump would cause the volume of the cell to __________.

Accepted Answer

A)  increase
B)  decrease
C)  remain the sameD) All of the above
E) A) and B)

Question 8

Diffusion is more rapid in cells with microvilli compared to cells lacking microvilli.

Accepted Answer

A) True 
 B)False

Question 9

The charge difference across a membrane produces the membrane potential.

Accepted Answer

A) True 
 B)False

Question 10

____________ transport does not require membrane proteins.

Accepted Answer

A)  Facilitated diffusion
B)  Bulk
C)  Simple diffusion
D)  ActiveE) All of the above
F) A) and C)

Question 11

The Na+/K+ pump transports _______ into the cell and ________ out of the cell per cycle.

Accepted Answer

A)  3Na+,2K+
B)  2Na+,3K+
C)  3K+,2Na+
D)  2K+,3Na+E) A) and D)
F) A) and C)

Question 12

Simple diffusion is the net diffusion of a solvent.

Accepted Answer

A) True 
 B)False

Question 13

Desmosomes are a type of junctional complex.

Accepted Answer

A) True 
 B)False

Question 14

Where are GLUT carriers located in an unstimulated muscle?

Accepted Answer

A)  in the plasma membrane facing the external environment
B)  in the plasma membrane facing the internal environment
C)  within cytoplasmic vesicles
D)  There are no GLUT carriers present.E) C) and D)
F) None of the above

Question 15

The Na+/K+ pump

Accepted Answer

A)  is an example of primary active transport.
B)  generates a positive membrane potential.
C)  actively transports 2 potassium ions out of the cell.
D)  actively transports 3 sodium ions into the cell.E) A) and B)
F) A) and C)

Question 16

What is necessary for a target cell to respond to a cell signaling molecule?

Accepted Answer

A)  being close together
B)  a second messenger
C)  specific receptor proteins
D)  All of these choices are necessary.E) A) and B)
F) B) and D)

Question 17

Cells placed in hypotonic solutions will

Accepted Answer

A)  decrease in volume.
B)  increase intracellular solute concentration.
C)  increase in volume.
D)  lose water to the solution.E) None of the above
F) A) and B)

Question 18

Why are cells in body organs generally within 100  μ\muμ m of a blood capillary?

Accepted Answer

A)  to decrease mean diffusion time
B)  to increase mean diffusion time
C)  so that larger particles can diffuse more easily
D)  a larger distance maximizes entropy E) B) and C)
F) All of the above

Question 19

Poisoning the Na+/K+ pump would

Accepted Answer

A)  generate a more negative membrane potential.
B)  increase cellular permeability to Na+.
C)  inhibit secondary active transport.
D)  increase cellular permeability to K+.E) A) and B)
F) A) and C)

Question 20

What molecules pass information from the polar regulatory molecule receptor to activate the enzymes that produce cAMP?

Accepted Answer

A)  paracrines
B)  G-proteins
C)  GTP
D)  None of these choices are correct.E) All of the above
F) None of the above

Exam 6: Interactions Between Cells and the Extracellular Environment

The rate of diffusion is influenced by

Correct AnswerverifiedShow Answer

Glucose transported via the GLUT carrier is characterized as

Correct AnswerverifiedShow Answer

Why are cells in body organs generally within 100 μ\muμ m of a blood capillary?

Correct AnswerverifiedShow Answer

____________ transport does not require membrane proteins.

Correct AnswerverifiedShow Answer

Poisoning the Na+/K+ pump would

Correct AnswerverifiedShow Answer

Poisoning the Na+/K+ pump would cause the volume of the cell to __________.

Correct AnswerverifiedShow Answer

Diffusion is more rapid in cells with microvilli compared to cells lacking microvilli.

Correct AnswerverifiedShow Answer

Simple diffusion is the net diffusion of a solvent.

Correct AnswerverifiedShow Answer

Cells placed in hypotonic solutions will

Correct AnswerverifiedShow Answer

One mole of solute per liter depresses the freezing point of water by -1.86 ∘\circ∘ C.

Correct AnswerverifiedShow Answer

Gas exchange between the cells and extracellular fluid utilizes active transport.

Correct AnswerverifiedShow Answer

What molecules pass information from the polar regulatory molecule receptor to activate the enzymes that produce cAMP?

Correct AnswerverifiedShow Answer

The charge difference across a membrane produces the membrane potential.

Correct AnswerverifiedShow Answer

What is necessary for a target cell to respond to a cell signaling molecule?

Correct AnswerverifiedShow Answer

The Na+/K+ pump

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The Na+/K+ pump transports _______ into the cell and ________ out of the cell per cycle.

Correct AnswerverifiedShow Answer

Desmosomes are a type of junctional complex.

Correct AnswerverifiedShow Answer

Where are GLUT carriers located in an unstimulated muscle?

Correct AnswerverifiedShow Answer

A 0.5M glucose (molecular weight = 180g) contains ____________ grams of glucose per liter.

Correct AnswerverifiedShow Answer

80% of the extracellular fluid is termed interstitial fluid.

Correct AnswerverifiedShow Answer

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Why are cells in body organs generally within 100 $\mu$ m of a blood capillary?

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Poisoning the Na⁺/K⁺ pump would

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Poisoning the Na⁺/K⁺ pump would cause the volume of the cell to __________.

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One mole of solute per liter depresses the freezing point of water by -1.86^$\circ$C.

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The Na⁺/K⁺ pump

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The Na⁺/K⁺ pump transports _ into the cell and __ out of the cell per cycle.

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