Question 1

Which is a correct example of tonicity?

Accepted Answer

A)   Water is hypertonic to red blood cells.
B)   Turgor pressure is created when a plant cell swells in a hypotonic solution.
C)   Plasmolysis results from plant cells in hypotonic solutions.
D)   Crenated red blood cells result when they are placed in a hypotonic solution.
E)   If a cell is placed in a hypertonic solution, water enters the cell.F) All of the above
G) None of the above

Question 2

An isotonic solution means that the solute concentration outside the cell

Accepted Answer

A)   is greater than inside the cell.
B)   is less than inside the cell.
C)   is the same as inside the cell.
D)   has no effect on the cell.
E)   is greater than outside the cell.F) None of the above
G) A) and E)

Question 3

What will happen to the protein solution of side A in Figure 4.1?

Accepted Answer

A)  It will become less concentrated since protein will move from A to B.
B)  It will become more concentrated since water passes from B to A.
C)  It will become more concentrated since water passes from A to B.
D)  It will become less concentrated since water passes from B to A.
E)  It will become more concentrated since protein will move from B to A.F) A) and B)
G) C) and D)

Question 4

Which is a correct association of protein types?

Accepted Answer

A)   carrier proteins-provide a pathway for substances to move across a membrane
B)   cell recognition proteins-allow a specific molecule to bind to it and may cause a cell response
C)   channel proteins-combine with a substance to help it move across a membrane
D)   receptor proteins-variations in these proteins cause tissue transplant rejection
E)   enzymatic proteins-carry out metabolic reactions directlyF) B) and D)
G) None of the above

Question 5

Which membrane transport process can continue whether the cell is alive or dead?

Accepted Answer

A)   sodium/potassium pump
B)   pinocytosis
C)   phagocytosis
D)   exocytosis
E)   diffusionF) C) and D)
G) A) and C)

Question 6

Oxygen leaves the alveoli in the lungs and enters the capillaries by endocytosis.

Accepted Answer

A) True 
 B)False

Question 7

What two components are commonly found in the extracellular matrix that help resist stretching and provide resilience?

Accepted Answer

A)   proteins & polysaccharides
B)   proteins & phospholipids
C)   polysaccharides & phospholipids
D)   amino acids & phospholipids
E)   nucleic acids & proteinsF) A) and D)
G) A) and B)

Question 8

Receptor-mediated endocytosis involves all of the following EXCEPT

Accepted Answer

A)   receptor proteins to bind to specific molecules.
B)   a coated pit due to a layer of fibrous protein on the cytoplasmic side of the membrane.
C)   various outcomes from destruction of the vesicle to restoration of the surface configuration.
D)   the mechanism for regulating exchange between a mother and fetus.
E)   secretion of materials from a cell.F) B) and E)
G) A) and B)

Question 9

Insulin formed by the Golgi apparatus in insulin-producing cells leaves those cells by

Accepted Answer

A)   special pore molecules that are embedded in the cell membrane.
B)   the insulin-filled vesicles fusing with the cell membrane and spilling their contents externally.
C)   moving along the endoplasmic reticulum until it is outside the cell membrane.
D)   the Golgi apparatus being connected with external channels directly to the cell membrane.
E)   diffusion across the cytoplasm.F) B) and C)
G) A) and B)

Question 10

A cell is placed in a solution of large nutrient molecules tagged with a red dye.Soon the cell is dark red,showing a concentration of the nutrient much higher than the external solution.We add a reagent that blocks the use of ATP.What result would you expect from this experiment?

Accepted Answer

A)   The nutrient would continue to rapidly enter the cell by diffusion because as a nutrient it is constantly being used in cell metabolism, so the cell will get redder.
B)   The color will remain the same since all future transfer will stop.
C)   The color will fade as the import of the nutrient stops and diffusion evens the concentrations.
D)   The cell will continue to get darker since the import of the nutrient does not involve ATP.
E)   The cell will die without access to ATP.F) C) and E)
G) All of the above

Question 11

If the proteins forming the cell junctions within the stomach were denatured,what is a likely consequence?

Accepted Answer

A)   The desmosome junctions would not hold together causing the cells in the stomach to pull apart.
B)   The tight junctions would not hold together causing the cells in the stomach to pull apart.
C)   The desmosome junctions would be bonded together more tightly causing the cells in the stomach to form a solid barrier.
D)   The gap junctions would not hold together causing the cells in the stomach to be unable to pass ions back and forth.
E)   The desmosome junctions would not hold together causing the cells in the kidney to pull apart.F) A) and D)
G) B) and C)

Question 12

The number of mitochondria in a cell would be a general indicator of the extent of

Accepted Answer

A)   diffusion.
B)   facilitated transport.
C)   active transport.
D)   osmosis.
E)   both osmosis and diffusion.F) A) and D)
G) D) and E)

Question 13

Carrier molecules are required for

Accepted Answer

A)   osmosis.
B)   both osmosis AND diffusion.
C)   facilitated diffusion.
D)   active transport.
E)   both facilitated diffusion AND active transport.F) A) and C)
G) C) and D)

Question 14

In the emergency room,saline solutions are often run into a person's vein.The saline solution must be

Accepted Answer

A)   0.1% NaCl
B)   0.5% NaCl
C)   0.75% NaCl
D)   0.9% NaCl
E)   9.0% NaClF) A) and C)
G) C) and E)

Question 15

Oxygen diffuses into the capillaries of the lungs because there is

Accepted Answer

A)   a higher concentration of O2 in the alveoli than the capillaries.
B)   a higher concentration of O2 in the capillaries than the alveoli.
C)   a higher concentration of CO2 in the alveoli than the capillaries.
D)   a higher concentration of CO2 in capillaries than the alveoli.
E)   an equal concentration of O2 in the alveoli and the capillaries.F) D) and E)
G) C) and D)

Question 16

Which function does the lipid bilayer component of the plasma membrane NOT provide for the cell?

Accepted Answer

A)   defines a permeable boundary between the organized interior and the chaotic external environment
B)   provides an impermeable, self-sealing membrane that keeps all internal living processes sealed inside
C)   controls the exchange of molecules between one cell and adjacent cells or the environment
D)   provides a fluid and flexible boundary that insulates the interior from the variations in humidity, food, and other external conditions
E)   provides a matrix for proteins that regulate the exchange of molecules between the inside and outside of the cellF) A) and D)
G) A) and C)

Question 17

The inside and outside of the plasma membrane are

Accepted Answer

A)   identical in both the phospholipid bilayer and the embedded proteins.
B)   identical in phospholipid bilayer but have cytoskeletal filaments on the outside and carbohydrate chains of glycolipids and proteins on the inside.
C)   identical in phospholipid bilayer but have cytoskeletal filaments on the inside and carbohydrate chains of glycolipids and proteins on the outside.
D)   different with a phospholipid bilayer on the inside and carbohydrate chains of glycolipids and proteins on the outside.
E)   different with a phospholipid bilayer on the outside and carbohydrate chains of glycolipids and proteins on the inside.F) A) and C)
G) D) and E)

Exam 4: Membrane Structure and Function

Which is a correct association of protein types?

Correct Answer
verified

An isotonic solution means that the solute concentration outside the cell

Correct Answer
verified

Receptor-mediated endocytosis involves all of the following EXCEPT

Correct Answer
verified

Which function does the lipid bilayer component of the plasma membrane NOT provide for the cell?

Correct Answer
verified

The inside and outside of the plasma membrane are

Correct Answer
verified

Oxygen diffuses into the capillaries of the lungs because there is

Correct Answer
verified

If the proteins forming the cell junctions within the stomach were denatured,what is a likely consequence?

Correct Answer
verified

The number of mitochondria in a cell would be a general indicator of the extent of

Correct Answer
verified

Which membrane transport process can continue whether the cell is alive or dead?

Correct Answer
verified

Carrier molecules are required for

Correct Answer
verified

Which is a correct example of tonicity?

Correct Answer
verified

Insulin formed by the Golgi apparatus in insulin-producing cells leaves those cells by

Correct Answer
verified

What will happen to the protein solution of side A in Figure 4.1?

Correct Answer
verified

Oxygen leaves the alveoli in the lungs and enters the capillaries by endocytosis.

Correct Answer
verified

A cell is placed in a solution of large nutrient molecules tagged with a red dye.Soon the cell is dark red,showing a concentration of the nutrient much higher than the external solution.We add a reagent that blocks the use of ATP.What result would you expect from this experiment?

Correct Answer
verified

What two components are commonly found in the extracellular matrix that help resist stretching and provide resilience?

Correct Answer
verified

In the emergency room,saline solutions are often run into a person's vein.The saline solution must be

Correct Answer
verified

Exam 4: Membrane Structure and Function

Which is a correct association of protein types?

Correct AnswerverifiedShow Answer

An isotonic solution means that the solute concentration outside the cell

Correct AnswerverifiedShow Answer

Receptor-mediated endocytosis involves all of the following EXCEPT

Correct AnswerverifiedShow Answer

Which function does the lipid bilayer component of the plasma membrane NOT provide for the cell?

Correct AnswerverifiedShow Answer

The inside and outside of the plasma membrane are

Correct AnswerverifiedShow Answer

Oxygen diffuses into the capillaries of the lungs because there is

Correct AnswerverifiedShow Answer

If the proteins forming the cell junctions within the stomach were denatured,what is a likely consequence?

Correct AnswerverifiedShow Answer

The number of mitochondria in a cell would be a general indicator of the extent of

Correct AnswerverifiedShow Answer

Which membrane transport process can continue whether the cell is alive or dead?

Correct AnswerverifiedShow Answer

Carrier molecules are required for

Correct AnswerverifiedShow Answer

Which is a correct example of tonicity?

Correct AnswerverifiedShow Answer

Insulin formed by the Golgi apparatus in insulin-producing cells leaves those cells by

Correct AnswerverifiedShow Answer

What will happen to the protein solution of side A in Figure 4.1?

Correct AnswerverifiedShow Answer

Oxygen leaves the alveoli in the lungs and enters the capillaries by endocytosis.

Correct AnswerverifiedShow Answer

A cell is placed in a solution of large nutrient molecules tagged with a red dye.Soon the cell is dark red,showing a concentration of the nutrient much higher than the external solution.We add a reagent that blocks the use of ATP.What result would you expect from this experiment?

Correct AnswerverifiedShow Answer

What two components are commonly found in the extracellular matrix that help resist stretching and provide resilience?

Correct AnswerverifiedShow Answer

In the emergency room,saline solutions are often run into a person's vein.The saline solution must be

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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