Related Experiment Video

Updated: Jun 19, 2026

Application of Electrophysiology Measurement to Study the Activity of Electro-Neutral Transporters
11:51

Application of Electrophysiology Measurement to Study the Activity of Electro-Neutral Transporters

Published on: February 3, 2018

Effect of magnesium on active and passive sodium transport in the human ileum

J S Fordtran, S G Morawski, C A Santa Ana

    Gastroenterology
    |November 1, 1985
    PubMed

    More Related Videos

    Studying the Activity of Neuropeptides and Other Regulators of the Excretory System in the Adult Mosquito11:30

    Studying the Activity of Neuropeptides and Other Regulators of the Excretory System in the Adult Mosquito

    Published on: August 24, 2021

    Demonstration of Membrane Transport of Histidine using Goat Intestinal Inverted Sacs: An Experiential Pedagogical Tool for Undergraduates04:40

    Demonstration of Membrane Transport of Histidine using Goat Intestinal Inverted Sacs: An Experiential Pedagogical Tool for Undergraduates

    Published on: October 4, 2024

    Related Concept Videos

    Primary Active Transport01:47

    Primary Active Transport

    In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they...
    Primary Active Transport01:29

    Primary Active Transport

    In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would not...
    Secondary Active Transport01:32

    Secondary Active Transport

    One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
    Drug Absorption Mechanism: Passive Membrane Transport01:23

    Drug Absorption Mechanism: Passive Membrane Transport

    Passive transport is a method of drug absorption where small, lipid-soluble drugs can move across the cell membrane. This movement happens along the concentration gradient, which is a natural flow from higher to lower concentration areas. The speed at which the drug moves is directly related to its lipid–water partition coefficient. This means that the more a drug dissolves in lipids, the faster it diffuses or spreads throughout the body. It is important to note that most drugs are either weak...
    Mineral, Vitamin and Water Absorption01:27

    Mineral, Vitamin and Water Absorption

    Electrolytes are essential minerals and ions primarily obtained from the diet and absorbed through the gastrointestinal tract. Most electrolytes are absorbed in the small intestine. While the absorption of iron and calcium primarily occurs in the duodenum, calcium is also absorbed in the jejunum and ileum. In these regions, passive diffusion contributes to its absorption alongside active transport mechanisms in the duodenum. These ions can exit the enterocytes through specialized active...
    Active Transport01:14

    Active Transport

    Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
    Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...