Active transport science definition

Active transport - transport of a substance as a protein or drug across a cell membrane against the concentration gradient. Active transport is transport against a concentration gradient that requires chemical energy.

Active transport is transport against a concentration gradient that requires chemical energy.

Active transport science definition. Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane from a region of lower concentration to a region of higher concentration. What is Active Transport. Active transport is an energy or ATP-dependent cellular transport process that selectively moves substances from an area of low concentration to an area of high concentration or against the concentration gradient with the help of a membrane protein.

Active transport is defined as movement of a solute from a region of low electrochemical potential on one side of the cell membrane to a region of higher electrochemical potential on the opposite side. Cell Physiology Source Book Fourth Edition 2012. Scientific definitions for active transport active transport The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion that is from an area of lower concentration to one of higher concentration.

Moving against a gradient. To move substances against a concentration or electrochemical gradient a cell must use energy. Active transport mechanisms do just this expending energy often in the form of ATP to maintain the right concentrations of ions and molecules in.

Active transport is a process that is required to move molecules against a concentration gradientThe process requires energy. Active transport in plants. Active transport is transport against a concentration gradient that requires chemical energy.

Active transport moves ions or molecules in a specific direction through the use of an integral. Other articles where active transport is discussed. Ussings definition of active transport made possible an understanding at the cellular level of the way in which ions and water are pumped into and out of living cells in order to regulate the ionic composition and water balance in cells organs and organisms.

Active transport mechanisms require the use of the cells energy usually in the form of adenosine triphosphate ATP. If a substance must move into the cell against its concentration gradient that is if the concentration of the substance inside the cell must be greater than its concentration in the extracellular fluid the cell must use energy to move the substance. There are two types of active transport.

Primary active transport also called direct active transport directly uses chemical energy such as from adenosine triphosphate or ATP in case of cell membrane to transport all species of solutes across a membrane against their concentration gradient. Uptake of glucose in the human intestines is an example of primary active. Active transport is the movement of particles against a concentration gradient from an area of low concentration to an area of high concentration at a rate faster than diffusion.

It requires energy in the form of ATP. It is a selective process as certain molecules can only be transported by certain proteins. Definition of active transport.

The movement of a chemical substance by the expenditure of energy against a gradient in concentration or in electrical potential across a plasma membrane compare passive transport. Active transport is the movement of molecules or ions against a concentration gradient from an area of lower to higher concentration which does. Active transport- the ingestion of bacteria or other material.

Becomes part of a vacuole inside of the membrane. Exocytosis definition and type of transport Active transport- contents of a cell vacuole are release to the exterior. This is how the cell gets rid of waste.

Active transport is the process of moving molecules across a cellular membrane through the use of cellular energy. The alternative to active transport is. Active transport aktiv transport the movement of ions or molecules across cell membranes and epithelial layers usually against a concentration gradient as a direct result of the expenditure of metabolic energy.

For example under normal circumstances more potassium ions are present within the cell and more sodium ions are present extracellularly. Active transport - transport of a substance as a protein or drug across a cell membrane against the concentration gradient. Requires an expenditure of energy.

The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion that is from an area of lower concentration to one of higher concentration. Active transport requires the assistance of a type of protein called a carrier protein using energy supplied by ATP.