Transport Across a Cell Membrane. The cell membrane is one of the great multi-taskers of biology. It provides structure for the cell, protects cytosolic contents from the environment, and allows cells to act as specialized units.
How to Amend the Constitution. Article V of the United States Constitution provides authority and instructions for amending the Constitution. Amendments can be proposed by Congress or by constitutional convention. Congress then decides how to ratify the amendment if approved by Congress or convention.
An article is something that was part of the constitution as originally written. An amendment is something added to the constitution latter on to correct some perceived flaw. What are referred to as the Bill of Rights are amendments added to the constitution to get the states to ratify it in the first place.