While voluntary dispersion may not often occur, animal dispersion occasionally does, as dispersion over large distances is likely to be passive transport by bats or other vertebrates.
12.
Active transport of H + ATPases alters membrane potential allowing for facilitated passive transport of particular ions such as Potassium down their charge gradient through high affinity transporters and channels.
13.
The research team's idea about the passive transport of protein-bound substances was triggered by the medical examination of patients with disorders caused by a lack of albumin.
14.
That is, as solutes are off-loaded into sink cells ( by active or passive transport ), the density of the phloem liquid decreases locally, creating a pressure gradient.
15.
Unlike passive transport, which uses the kinetic energy and natural entropy of molecules moving down a gradient, active transport uses cellular energy to move them against a gradient, polar repulsion, or other resistance.
16.
As water is consumed at the anode in the reaction, pure methanol cannot be used without provision of water via either passive transport such as back diffusion ( osmosis ), or active transport such as pumping.
17.
Animals may also disperse the seed or fruit of plants, either by eating it ( in which case they receive the benefit of nourishment ) or by passive transport, such as seeds sticking to fur or feathers.
18.
For example, the large majority of passive transport of water occurs in the proximal tubule and the descending thin limb, or the active transport of NaCl largely occurs in the proximal tubule and the thick ascending limb.
19.
They are synthesised in the cytoplasm itself, and I guess they hang around in the cytoplasmic fluid until it is picked up, and if I recall correctly, mainly passive transport is involved; active transport may assist somewhat.
20.
Passive osmosis and diffusion : Some substances ( small molecules, ions ) such as carbon dioxide ( CO 2 ) and oxygen ( O 2 ), can move across the plasma membrane by diffusion, which is a passive transport process.
