Definition: The “uphill” transport of substances Table of Contents Active transport is a type of cellular transport in which substances (e.g. ions, glucose, and amino acids) are transported across a biological membrane towards the region that already contains a lot of such substances. Because...
Kristin has taught college Biology courses and has her doctorate in Biology. In summary, we have learned that active transport is transport that requires chemical energy to move substances against a concentration gradient. There are three types of integral membrane proteins that aid in active transpor...
The thermodynamic definition of active transport is restated in terms of the rate of entropy production. A substance is said to be transported actively when the product of its flux by the force acting upon it across the membrane is negative. A general expression for the rate of entropy ...
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
Active Transport is the movement of molecules from a region of lower concentration to a region of higher concentration with the use of energy.
How do active and passive transport differ? What are examples of each? Explain the meaning of active transport as used in biology. Provide an example of passive transport. What processes are considered passive transport? How does passive and active transport differ? Describe the difference...
diffusion using carrier or channel proteins in the cell membrane that assist in the movement of molecules across a concentration gradient. The third type of movement is known as osmosis, or the movement of water to equalize solute concentration.Read Passive Transport Definition, Types & Examples ...
However, any natural carpet is likely to feature some heterogeneity in its force distribution that can drive local advection flows (see Methods: Advective and di usive transport’). This imposes a constraint on the generalised Fick’s laws we discussed so far: If the particles are stuck in ...
the condition in which muscle exists immediately before and during contraction which makes it nonextensible. It is caused by the attachment of MYOSIN bridges to ACTIN filaments. Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005Want...
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