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What two forces drive the passive transport of ions across a membrane?
Wiki User
∙ 15y ago
Two forces drive the passive transport of ions across a membrane: -the concentration gradient of the ions -the effect of membrane potential (voltage) on the ions
Wiki User
∙ 15y ago
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What would passive spinal movement under a load result in?
increased degree of compressive forces on affecting discs
The use of hydrostatic forces to move fluids through a membrane is?
Facilitated diffusion is incorrect. The answer is filtration.
Why does a cell have a cell membrane?
The cell membrane does not just separate the inside of the cell from the outside of the cell. It provides flexibility to the cell. It also creates a semi-permeable membrane, therefore letting osmosis of water occur. Without the cell membrane, cells would not be able to maintain equilibrium, and no cells would be able to survive today.
What is the state of equilibrium in biology?
Balance. In chemistry such is the state either after a reaction has completed or (assumed) prior to the addition of a catalyst. In most other things it means a state of being analogous to the chemical definition, i.e., steady state, calm, non-reactive, an even balance of opposing forces so that conflict (a reaction) is not ongoing. In relation to membrane chemistry, it means that substances are no longer or merely not passing across the membrane to establish this state of "equilibrium". In gas physics and most other studies it means the equal dispersion of "something" throughout the environment in which it can disperse.
Why is bone anisotropic?
Bone is considered anisotropic because it responds differently if forces are applied in different directions. Bone can handle large forces applied in the longitudinal plane (tension and compression); bone is not as strong in handling forces applied transversely across its surface.The differences between the properties of the cancellous and cortical bone contribute to the anisotropy of the bone. Cancellous bone provides bending strength, and cortical bone provides significant compressive strength.
What is the transport is it when the blood pressure forces some water and solute particles from a blood vessel and into the kidneys?
Filtration is when fluids and solutes flow down their pressure gradient across a membrane such as in the glomerulus of the kidney.
When hydrostatic pressure forces water across a membrane passively the process is called?
It's called Filtration
Types of bulk transport in cell?
Bulk transport is in 2 forms, exocytosis and endocytosis. Each of these 2 forms can then be sub divided into phagocytosis (movement of solids) and pinocytosis (movement of liquids) When bulk transport occurs, a phospholipid bilayer membrane merges with the cell membrane, and forces the contents of the vesicle in.out of the cell.
What forces a cell membrane to cell walls?
i think it is the nucleus that forces the cell membrane to cell walls.
What is the Difference between membrane potential and equilibrium potential?
Equilibrium potential is referring to the equilibrium (or balance) established between the forces of diffusion and electrical forces specific to each ion. For example, the equilibrium potential for Potassium, K+, in a cell with a semi permeable membrane is -80mV or Ek+=80mV. The membrane potential, on the other hand, refers to the voltage across the membrane at anytime and takes into account a range of equilibrium potentials such as Potassium, Sodium etc.
When would cells need energy to move particles across a membrane?
Active transport over a membrane is called active because it requires conformal changes of the proteins involved, provided whatever you want to bring across is not hydrophobic enough to simply dissociate over the membrane. There are different types of carriers in biological membranes. The non-active ones are constantly open pores (for water, for example), which require no energy to stay open. However, the other methods of providing movement across the membrane come as either pores that can change their state from closed to open, or as carriers or pumps which actively transport a substance across the membrane by allowing it to attach to them (or diffuse close to them) and then changing their conformation to wield the substance to the other side of the membrane (or to open a pore). Usually, the carrier or pump is in its normal conformation in the first place because of electric and covalent forces that keep it in this functional shape. To change and wield or pump a substance across the membrane (or to open a pore), these forces need to be overcome. That requires energy (usually provided by splitting phosphate off an ATP molecule). Some carriers also simply need the energy to get back into their original shape (if the substance that attaches to them adds different chemical forces to the original carrier that already suffice to cause a conformational change).
Process where cell forces out contents through membrane?
osmosis
Why did General Pershing use the convoy system to transport forces?
During World War I, not only American General John Pershing but also all other Allied commanders and forces utilized the convoy-system to transport forces and supplies across the waters of the ocean. The reason was, quite simply, safety: utilizing the convoy-system provided better protection for merchant ships and put enemy attacks at a great disadvantage, thereby enabling more ships to travel safely.
Why did general Pershing use to convoy system to transport forces?
During World War I, not only American General John Pershing but also all other Allied commanders and forces utilized the convoy-system to transport forces and supplies across the waters of the ocean. The reason was, quite simply, safety: utilizing the convoy-system provided better protection for merchant ships and put enemy attacks at a great disadvantage, thereby enabling more ships to travel safely.
How have shopping patterns changed?
Bcause of the better transport and market forces.
Which branch of the U.S. Armed Forces is composed of land combat and service forces which includes aviation water transport and space and cyberspace forces?
The US Army
What is the slab that forms when magma forces itself across rock layers?
The slab that forms when magma forces itself across rock layers is called a dike.
