Chapter 05 – Membranes
52. During neuronal signaling, a change in membrane potential will cause sodium channels to
open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the
following helps establish the concentration gradient necessary for this process to occur?
Chapter 05 – Membranes
53. If you were to replace the phosphate group of a phospholipid with a fatty acid chain, you
would have
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about the structure of a phospholipid? What other information is
related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
54. If you were a very thirsty cell, which process would you use to take in some nutrients
secreted by one of your neighbors?
55. How can freeze-fracture be used to determine the orientation of a protein in a
membrane?
Chapter 05 – Membranes
5-44
56. 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?
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about the role of adhesion molecules in white blood cell movement?
What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
Chapter 05 – Membranes
5-46
57. Membrane potential will affect the directional movement of
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
the movement of molecules.
Gather Content
•
What do you know about the impact of membrane potential on the movement of
molecules? What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
5-47
Check All That Apply Questions
58.
Choose all that apply. A concentration gradient is exhibited when
Multiple Choice Questions
Chapter 05 – Membranes
5-48
59. The rate of diffusion of molecules would be fastest in a cell with an
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about factors that affect the rate of diffusion? What other information
is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
5-49
60. When the solute concentration of solution A is lower than the solute concentration
of solution B, solution A is considered
Check All That Apply Questions
61.
If ATP production is blocked, decreased transport of material across a membrane occurs. Which type of transport is affected?
Choose all that apply.
Multiple Choice Questions
Chapter 05 – Membranes
5-50
62. 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
Clarify Question
•
What is the key concept addressed by the question?
o The question asks about the effects of tetrodotoxin on ion movement in neurons.
•
What type of thinking is required?
Gather Content
•
What do you know about the effects of tetrodotoxin on ion movement in neurons? What
other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
5-51
63. An individual is constipated. They take magnesium salts to help loosen the stool. Why
does this work?
Clarify Question
•
What is the key concept addressed by the question?
o The question asks about osmosis.
•
What type of thinking is required?
Gather Content
•
What do you know about osmosis? What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
64. Cholesterol is a structural component of cell membranes. Amount of cholesterol present
can affect membrane stability and permeability. What is the role of cholesterol in a
membrane?
Chapter 05 – Membranes
5-53
65. A dehydrated runner drinks a lot of water after a race. They rehydrate because
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about osmosis? What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
5-54
66. To test for the presence of starch, iodine can be used. A positive reaction results in a
black color. A dialysis bag filled with starch solution and secured on both ends is placed in
iodine solution. After 30 minutes the dialysis bag appears black. Based on this information,
what most accurately describes what happened?
Chapter 05 – Membranes
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about dialysis? What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
5-56
67. A mixed solution of water and small molecules is exposed to a cell membrane and
allowed to interact for an hour. Which molecule would be most likely to cross the
phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the
fastest?
Clarify Question
•
What is the key concept addressed by the question?
•
What type of thinking is required?
Gather Content
•
What do you know about diffusion? What other information is related to the question?
Choose Answer
•
Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
three choices are all ions and would not diffuse rapidly without the aid of transport proteins.
Reflect on Process
•
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 05 – Membranes
5-57
Three (3) eggs are boiled and all weigh 2g. The eggs are placed in a 15% solution of NaCl
and reweighed after 30 minutes.