Membrane potential will affect the directional movement of

Question

A.  Glucose (C6H12O6)
B.  Cholesterol
C.  Potassium (K+)
D.  Oxygen (O2)

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 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?
 

Answer 1

C.  Potassium (K+)

Clarify Question
· What is the key concept addressed by the question?
        o The question asks about the impact of membrane potential on the movement of molecules.
· What type of thinking is required?
        o You are being asked to analyze statements about the impact of membrane potential on 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?
        o Membrane potentials are formed when there are differences in charge across a membrane. This will affect the movement of charged ions across the membrane with positively charged ions moving towards the side of the membrane with a net negative charge and negatively charged ions moving towards the net positively charged side.

Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
        o Of the options, only potassium is an ion and will be affected by a membrane potential, moving towards the negatively charged side of the membrane.
 
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?
        o This question asked you to analyze statements about the impact of membrane potential on the movement of molecules. If you got the correct answer, great job! If you got an incorrect answer, where did the process break down? Did you realize that a membrane potential involved different charges across a membrane? Did you think that molecules without a charge would be affected by the membrane potential?