Defying one of biology’s more persistent dogmas, a potassium channel combines functions once thought to be invariably asunder. This channel, which is found in common bacteria, incorporates a subunit ...

ACTIVE transport of sodium across cell membranes is now established as one of the fundamental physiological processes of most vertebrate cells. This process probably requires some sort of carrier ...

This is a preview. Log in through your library . Abstract Active transport of amino acids in isolated membrane vesicles of E. coli ML 308-225 is stimulated by oxidation of D-lactate, and this ...

We present a stochastic model of active vesicular transport and its role in cell polarization, which takes into account positive feedback between membrane-bound signaling molecules and cytoskeletal ...

Diffusion Substances move from a high to a lower concentration down a concentration gradient Carbon dioxide, oxygen, water, food substances, wastes, eg urea No Osmosis Water moves from a high to a ...

Jamila and Megan have had a Halloween party and, after eating so many sweets and chocolates, they feel like they cannot eat another bite. When discussing transport to get home, Alfred, the science app ...