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Where does the energy to move hydrogen ions across the thylakoids membrane come from?
Concentration gradient is made first.Solar energy is used.
When a cell expands energy to move molecules or ions across membrane the process is known as?
Chemiosmosis
During depolarization does the neurons membrane become negative?
Yes. Positive ions (sodium) move across the membrane.
When ions move across a plasma membrane what will happen?
they create a flow of electrical currrent that can disturb the resting membrane potential.
What energy is required to move nutrients across a cell membrane?
active transport requires energy to move stuff and the energy is ATP
The energy from the electrons moving down the chain is used to move H ions across the?
Energy from the electrons move down the chain is used to move H plus ions across the inner membrane. H plus ions move through channels of ATP synthase in the inner membrane.
Where does the energy to move hydrogen ions across the thylakoids membrane come from?
Concentration gradient is made first.Solar energy is used.
When a cell expands energy to move molecules or ions across membrane the process is known as?
Chemiosmosis
What uses a protein to move a molecule across a membrane without energy?
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
During depolarization does the neurons membrane become negative?
Yes. Positive ions (sodium) move across the membrane.
How is passive transport different then active transport?
An example of passive transport would be the process of osmosis (water diffusing between a membrane-- from an area of high concentration to an area of low concentration). It is known as passive transport because no energy is needed in order to move the water across the membrane. When no energy is needed to move the substance it is considered passive transport. On the other hand, when energy IS needed to transport molecules or substances across a membrane it is referred to as active transport. An example of this would be a calcium pump located in the lipid bilayer of a plasma membrane which can transport potassium (K+) ions across it. Energy is needed in order to move those potassium ions across the membrane, and therefore is referred to as active transport.
What are the types of membrane protein?
ATP-powered pumps are ATPase's that use the energy of ATP hydrolysis to move ions or small molecules across a membrane against a chemical concentration gradient or electric potential. Channel proteins transports water or specific types of ions down their concentration or electric potential gradients. Transporters move a wide variety of ions and molecules across cell membranes.
When ions move across a plasma membrane what will happen?
they create a flow of electrical currrent that can disturb the resting membrane potential.
What energy is required to move nutrients across a cell membrane?
active transport requires energy to move stuff and the energy is ATP
What is the movement of materials across a membrane that requires energy input called?
Active transport requires energy and proteins to move the materials across the cell membrane. This is in contrast to osmosis, which doesn't require energy to move the material.
What is it called when molecules uses energy to move across a semipermeable membrane?
Active transport
What used a protein to move a molecule across a cell membrane without energy?
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
