Question 1

Which of the following protein classes are not found as membrane proteins?

Accepted Answer

A)  transport channels
B)  hormones
C)  receptors
D)  enzymes
E)  identity markersF) B) and C)
G) B) and D)

Question 2

Osmosis is the diffusion of water across a membrane in response to the concentration of one or more of the ________.

Accepted Answer

A)  solutes
B)  membranes
C)  compartments
D)  cellsE) A) and B)
F) All of the above

Question 3

Receptor-mediated endocytosis brings in specific material by engulfing it in vesicles.What factors,either directly or indirectly,are related to this process? Choose all that apply.

Accepted Answer

A)  It is a passive process.
B)  It helps to increase membrane fluidity by helping to transport cholesterol into the cell.
C)  It is an active process.
D)  It uses carrier proteins.
E)  A clathrin coat is present.F) B) and D)
G) A) and C)

Question 4

The diagram shows the rate of diffusion into a cell using carrier proteins.
  McGraw-Hill Education
-Carrier proteins are saturated at which point?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) None of the above
F) All of the above

Question 5

Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________.

Accepted Answer

A)  proteins
B)  transmembrane carbohydrates
C)  membrane pores
D)  aquaporinsE) A) and B)
F) A) and C)

Question 6

Osmosis can only occur if water travels through the

Accepted Answer

A)  cell wall.
B)  semipermeable membrane.
C)  vacuole.
D)  ER.
E)  cytoskeleton.F) A) and C)
G) A) and D)

Question 7

While water continually orients phospholipids into a lipid bilayer,it does not fix the lipids permanently into position.Thus,the bilayer is considered to be ________.

Accepted Answer

A)  static
B)  fluid
C)  fluctuating
D)  chargedE) A) and D)
F) C) and D)

Question 8

Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue.It typically happens when an area of the body is injured or damaged,and an inflammation response is required.What role would you expect cell adhesion molecules to play in this process?

Accepted Answer

A)  Cell adhesion molecules will allow the white blood cells to cling to one another to form a migrating clot.
B)  Cell adhesion molecules help white blood cells adhere to the blood vessel wall so that they can migrate across the wall and infiltrate into the underlying tissue.
C)  Cell adhesion molecules will allow the white blood cells to attach to the injured area so they become immobile.D) B) and C)
E) All of the above

Question 9

If two solutions have unequal concentrations of a solute,the solution with the lower concentration is called

Accepted Answer

A)  isotonic.
B)  hypertonic.
C)  hypotonic.
D)  osmosis.E) C) and D)
F) All of the above

Question 10

What initiates the sodium-potassium pump?

Accepted Answer

A)  Three sodium ions bind to the cytoplasmic side of the protein.
B)  Three sodium ions are translocated out of the cell.
C)  Phosphorylated pump has low affinity for sodium allowing sodium to leave and potassium to bind.
D)  Two potassium ions are transported into the cell.
E)  ATP binds to the protein which becomes phosphorylated (ADP is released) .F) B) and D)
G) C) and E)

Question 11

A type of transport of a solute across a membrane,up its concentration gradient,using protein carriers driven by the expenditure of chemical energy is known as

Accepted Answer

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

Question 12

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes.
  McGraw-Hill Education
-Which egg is isotonic to the solution?

Accepted Answer

A)  Egg 1
B)  Egg 2
C)  Egg 3D) A) and B)
E) None of the above

Question 13

The process often referred to as "cellular eating" is

Accepted Answer

A)  osmosis.
B)  pinocytosis.
C)  phagocytosis.
D)  diffusion.
E)  active transport.F) B) and C)
G) A) and C)

Question 14

Tetrodotoxin is a potent poison,produced by some newts,pufferfish,and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons.A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick.The most likely action the poison takes is

Accepted Answer

A)  Mimicking a symporter and allowing sodium to rush out and potassium to rush in.
B)  Mimicking an antiporter and allowing sodium to rush out.
C)  Blocking an antiporter so sodium cannot rush in.
D)  Blocking a symporter and keeping sodium from rushing in.E) B) and D)
F) B) and C)

Question 15

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes.
  McGraw-Hill Education
-The solution in the container is hypertonic to which egg?

Accepted Answer

A)  Egg 1
B)  Egg 2
C)  Egg 3D) All of the above
E) A) and B)

Question 16

What describes the movement of substances down their concentration gradients?

Accepted Answer

A)  Bulk transport
B)  Active transport
C)  Saturation
D)  DiffusionE) All of the above
F) C) and D)

Exam 5: Membranes

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes. McGraw-Hill Education -The solution in the container is hypertonic to which egg?

Correct Answer
verified

Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue.It typically happens when an area of the body is injured or damaged,and an inflammation response is required.What role would you expect cell adhesion molecules to play in this process?

Correct Answer
verified

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes. McGraw-Hill Education -Which egg is isotonic to the solution?

Correct Answer
verified

The process often referred to as "cellular eating" is

Correct Answer
verified

Tetrodotoxin is a potent poison,produced by some newts,pufferfish,and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons.A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick.The most likely action the poison takes is

Correct Answer
verified

Which of the following protein classes are not found as membrane proteins?

Correct Answer
verified

The diagram shows the rate of diffusion into a cell using carrier proteins. McGraw-Hill Education -Carrier proteins are saturated at which point?

Correct Answer
verified

Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________.

Correct Answer
verified

Osmosis is the diffusion of water across a membrane in response to the concentration of one or more of the ________.

Correct Answer
verified

What initiates the sodium-potassium pump?

Correct Answer
verified

If two solutions have unequal concentrations of a solute,the solution with the lower concentration is called

Correct Answer
verified

While water continually orients phospholipids into a lipid bilayer,it does not fix the lipids permanently into position.Thus,the bilayer is considered to be ________.

Correct Answer
verified

Receptor-mediated endocytosis brings in specific material by engulfing it in vesicles.What factors,either directly or indirectly,are related to this process? Choose all that apply.

Correct Answer
verified

What describes the movement of substances down their concentration gradients?

Correct Answer
verified

A type of transport of a solute across a membrane,up its concentration gradient,using protein carriers driven by the expenditure of chemical energy is known as

Correct Answer
verified

Osmosis can only occur if water travels through the

Correct Answer
verified

Exam 5: Membranes

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes. McGraw-Hill Education -The solution in the container is hypertonic to which egg?

Correct AnswerverifiedShow Answer

Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue.It typically happens when an area of the body is injured or damaged,and an inflammation response is required.What role would you expect cell adhesion molecules to play in this process?

Correct AnswerverifiedShow Answer

Three (3) eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes. McGraw-Hill Education -Which egg is isotonic to the solution?

Correct AnswerverifiedShow Answer

The process often referred to as "cellular eating" is

Correct AnswerverifiedShow Answer

Tetrodotoxin is a potent poison,produced by some newts,pufferfish,and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons.A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick.The most likely action the poison takes is

Correct AnswerverifiedShow Answer

Which of the following protein classes are not found as membrane proteins?

Correct AnswerverifiedShow Answer

The diagram shows the rate of diffusion into a cell using carrier proteins. McGraw-Hill Education -Carrier proteins are saturated at which point?

Correct AnswerverifiedShow Answer

Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________.

Correct AnswerverifiedShow Answer

Osmosis is the diffusion of water across a membrane in response to the concentration of one or more of the ________.

Correct AnswerverifiedShow Answer

What initiates the sodium-potassium pump?

Correct AnswerverifiedShow Answer

If two solutions have unequal concentrations of a solute,the solution with the lower concentration is called

Correct AnswerverifiedShow Answer

While water continually orients phospholipids into a lipid bilayer,it does not fix the lipids permanently into position.Thus,the bilayer is considered to be ________.

Correct AnswerverifiedShow Answer

Receptor-mediated endocytosis brings in specific material by engulfing it in vesicles.What factors,either directly or indirectly,are related to this process? Choose all that apply.

Correct AnswerverifiedShow Answer

What describes the movement of substances down their concentration gradients?

Correct AnswerverifiedShow Answer

A type of transport of a solute across a membrane,up its concentration gradient,using protein carriers driven by the expenditure of chemical energy is known as

Correct AnswerverifiedShow Answer

Osmosis can only occur if water travels through the

Correct AnswerverifiedShow Answer

Correct Answer
verified

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