Under What Circumstances Does Membrane Transport Require Energy

Active transport is the movement of molecules across a membrane requiring energy to be expanded by the cell active transport requires energy passive transport is diffusion across a membrane.

The nature of biological membranes especially that of its lipids is amphiphilic as they form bilayers that contain an internal hydrophobic layer and an external hydrophilic layer. In a normal cell membrane transport is vital for the movement of glucose and amino acids into the cells for the production of energy and protein synthesis respectively. Whenever a solute needs to be moved from low concentration to high concentration through a phospholipid bilayer membrane. A whenever a solute is charged such as an ion and is moved through a phospholipid bilayer.

In the nerve cell the conduction of nerve impulses occurs by polarization depolarization and repolarization process. 14 under what circumstances does membrane transport always require energy. Question 12 1 point under what circumstances does membrane transport always require energy. 58 under what circumstances does membrane transport always require energy.

Under what circumstances does membrane transport always require energy. The substances transported by active transport are glucose aminoacids organic acids and inorganic ions so4 po4 k etc. Membrane b whenever a solute needs to be moved from low concentration to high concentration through a phospholipid bilayer membrane c whenever a solute is charged such as an ion. This structure makes transport possible by simple or passive diffusion which consists of the diffusion of substances through the membrane without expending metabolic energy and without the aid of transport proteins.

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Whenever a molecule is polar and is moved through a phospholipid bilayer membrane. Whenever a molecule is non polar and is moved through a phospholipid bilayer membrane o whenever molecules are moved that are too large to pass through the phospholipid bilayer membrane o o whenever a solute needs to be moved from low concentration to high concentration through a phospholipid bilayer membrane o whenever a molecule is polar and is moved through a phospholipid bilayer membrane. Whenever a solute needs to be moved. In active transport permease or transporter protein carries the molecules across the membrane and the energy required to transport is obtained by atp or ion gradient.

Similarly energy from atp is required for these membrane proteins to transport substances molecules or ions across the membrane usually against their concentration gradients from an area of low concentration to an area of high concentration.