Mar 22, 2014 · Cell Membrane Transport - Transport Across A Membrane - How Do Things Move Across A Cell Membrane - Duration: 10:50. Whats Up Dude 254,861 views
There are two kinds of secondary active transport: counter-transport, in which the two substrates cross the membrane in opposite directions, and cotransport, in which they cross in the same direction. In primary active transport, the breakdown of ATP is what causes the molecules to transport while in secondary active transport, the energy comes from one molecule’s concentration gradient. There are other differences, of course, but these are the major differences and the main ways to identify each of the transport types. Oct 26, 2019 · Secondary active transport achieves an identical result as primary active transport in that particles are moved from low concentration to high concentration at the expense of energy. 2 Secondary active transport, however, functions independent of direct ATP coupling. Rather, the electrochemical energy generated from pumping ions out of the cell ...
Nov 19, 2019 · Secondary Active Transport (Co-transport) Unlike in primary active transport, in secondary active transport, ATP is not directly coupled to the molecule of interest. Instead, another molecule is moved up its concentration gradient, which generates an electrochemical gradient. The downhill transport of Na+ (from higher to lower concentration) into the cell furnishes the energy for the uphill transport of glucose (fig. 6.18). Notice that, in order for this secondary active transport to work, a steep gradient for Na+ must have already been established by the activity of the Na+/K+ pumps.
Secondary active transport is a type of active transport that moves two different molecules across a transport membrane. One of the molecules, which may be an ion, moves across the biological membrane, down its electrochemical gradient. This primary molecule is what allows the other molecule, possibly another ion, to move in an uphill direction ... Co-transport: Secondary Active Transport. Recall that several things have happened as a result of the primary active transport process. At this point, there are more sodium ions outside of the cell than inside and more potassium ions inside than out.