passive transport

Osmosis is passive transport, meaning it does not require energy to be applied.

This is not passive transport, but requires energy, and is selective.

Channels perform passive transport of materials also known as facilitated diffusion.

Nutrient transfer to the fetus occurs via both active and passive transport.

Natural dispersal of this snail is known to occur by passive transport in birds.

The wax, which sticks to each egg, also facilitates passive transport by animals or man.

Usually, two types are distinguished: Active transport requires chemical energy, while passive transport does not.

Passive transport is a movement of biochemicals and other atomic or molecular substances across membranes.

Passive transport - Movement of molecules into and out of cells without the input of cellular energy.

They diffuse in and out of cells by both passive transport and active transport mechanisms.

More recent investigations with rat jejunal brush border membrane vesicles, however, have found evidence only for passive transport.

Another means of dispersal over larger distances is likely to be passive transport of spiders by bats or other vertebrates.

The four main kinds of passive transport are diffusion, facilitated diffusion, filtration and osmosis.

Active transport uses cellular energy, unlike passive transport, which does not use cellular energy.

Because of this fact, the most likely explanation for resemblances between populations located on either side of the Mediterranean would be passive transport due to human activities.

Active transport and Passive transport - The processes facilitating the movement of molecules into and out of cells.

Short distances may tend towards passive transport whereas longer distances tend towards active transport.

Simple diffusion and osmosis are both forms of passive transport and require none of the cell's ATP energy.

However, channels called porins are present in the outer membrane that allow for passive transport of many ions, sugars and amino acids across the outer membrane.

Although active transport is not modeled by the artificial PAMPA membrane, up to 95% of known drugs are absorbed by passive transport.

It is seen e.g. in the passive transport in renal sodium reabsorption, renal chloride reabsorption as well as renal urea handling.

The proton binds with sucrose in the extracellular fluid, then undergoes passive transport down its concentration gradient (i.e. up the concentration gradient of sucrose).

The rate of passive transport depends on the (semi-)permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins.

The permeases are membrane transport proteins, a class of multipass transmembrane proteins that facilitate the diffusion of a specific molecule in or out of the cell by passive transport.

These micelles are formed from dietary fats and bile acids, and help to solubilize the hydrophobic lycopene and allow it to permeate the intestinal mucosal cells by a passive transport mechanism.