b) Does your answer to the question “a” require input of energy? Explain. c) If

Question

b) Does your answer to the question “a” require input of energy? Explain.

c) If the barrier is a phospholipid bilayer, what chemical property of the black circles would determine whether or not they could move through the barrier? Explain

d) If the barrier is a phospholipid bilayer, the black circles are dissolved in water, and the black circles cannot move through the barrier, what will happen in this beaker over time? Why?

e) Does your answer to question “d” require input of energy? Explain.

Explanation / Answer

1.The particles will go from the area’s of higher concentration to the other side which is of lower particle concentration.

b) The concentration gradient does not requireinput of energy, it is the greater concentration the morerapidly a substance diffuses.

c) Small nonpolar and uncharged molecules canenter the membrane readily and pass through it. Gases,including oxygen and carbon dioxide, can crossmembranes through simple diffusion. This is the process whereby a substance passes through a membrane.

D. The diussolved black circles will move across the membrane by the process of facilitated diffusion from higher concentration to lower concentration.

E.no it does not require energy .facilitated diffusion does not require energy .it involves the use of proteins .

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