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.
Home > The Constitution > How is the Constitution Amended? What is an amendment? An amendment to the Constitution is an improvement, a correction or a revision to the original content approved in 1788. To date, 27 Amendments have been approved, six have been disapproved and thousands have been discussed.