In: Anatomy and Physiology
Answer the following questions (please cite your textbook or
other reference you use, no wikis please)
1. Skeletal muscle cells produce glucose carriers (GLUT 4
transporters). Rather then having these transporters continually on
their surface, they store them inside vesicles within the cell.
During exercise (muscular contraction), these vesicles fuse with
the plasma membrane of the cell, inserting the transporters into
the membrane. This allows glucose to enter the cell by passive
transport. Which of the factors that affect simple diffusion has
been altered in this example?
2. Recall the chemiosomotic synthesis of ATP occurring inside the
mitochondria. Would you expect to measure an electrical potential
across the inner membrane of the mitochondria when chemiosmosis is
active? Why or why not? If so, which compartment in the
mitochondria would have a more positive charge?
Please answer the specific questions no need for additional information.