I lost my book and need help in the meanwhile while the book and cd are sent again. Much appreciated.
Do Activity 1 (Simulating Dialysis or Simple Diffusion) in Exercise 1 (The Cell) in the PhysioEx lab book. Answer the following questions based on your results.
a. Which solutes (NaCl, urea, albumin, glucose) were able to diffuse through the dialysis membrane?
b. Which solutes did not diffuse?
c. What single characteristic of the semipermeable membrane used in this experiment determined which substances pass through it?
d. What other factors influence the passage of substances through living membranes?
e. Assume the left beaker contains 4mM NaCl, 9mM glucose, and 10mM albumin. The right beaker contains 10mM NaCl, 10mM glucose, and 40mM albumin. Furthermore, the dialysis membrane is permeable to all substances except albumin. State whether the substance below will move to the right beaker(R), to the left beaker(L), or not move(NM).
Glucose ______ Water ________ Albumin _______ NaCl ________ a. b. c. d. e. Glucose _____ Water _____ Albumin ______ NaCl _____
Continue with Exercise 1 (The Cell) in the PhysioEX lab book by doing Activity 2(Simulating Facilitated diffusion). Based on your reading and your results, answer the following questions:
a. Are substances able to travel against their concentration gradient?
b. Name two ways to increase the rate of glucose transport.
c. Did NaCl affect glucose transport? Explain your answer.
d. Does NaCl require a transport protein for diffusion? Explain your answer. a. b. c. d.
Continue with Exercise 1 (The Cell) in the PhysioEX lab book by doing Activity 5 (Simulating Active Transport). Based on your reading and your results, answer the following questions:
a. Does the presence of glucose carrier proteins affect Na+ carriers? Explain your answer.
b. Can Na+ be transported against its gradient?
c. Are Na+ and K+ transported in the same direction?
d. The ratio of Na+ to K+ transport is ___ Na+ transported out of the cell for every ___ K+ transported into the cell. a. b. c. d.
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