Describe the action of a Na+-K+ pump
What will be an ideal response?
Three Na+ ions bind to the ICF side of the pump, which allows the pump to then split ATP into ADP and phosphate. The phosphate binds to the pump (i.e., the pump is phosphorylated), which then changes shape and transports the Na+ ions to the ECF. After the Na+ ions leave the pump, two K+ ions attach to the ECF side of the pump, which then causes the phosphate group to detach from the pump. Dephosphorylation causes the pump to change shape and transport the K+ ions into the cell. When the K+ ions detach from the pump, the pump is now ready to repeat the process.
You might also like to view...
The elasticity of human skeletal muscle tissue is believed to be due primarily to which of the following?
A. the parallel elastic component B. the series elastic component C. the continuous elastic component D. the active elastic component
The right and left sides of the cerebrum are connected by the:
a. corpus callosum b. sulcus c. gyrus d. basal ganglia
Which region of a somite differentiates into the skeletal muscles?
A. Dermatome B. Sclerotome C. Myotome
Some joints become synostoses by replacing ________ with ________.
A. fibers; cartilage B. cartilage; fibers C. bone; fibers D. bone; cartilage E. fibers; bone