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What are two important passive processes for membrane transport?
Diffusion is a method of natural movement of gas molecules from a region of higher concentration to a region of lower concentration. The difference in concentration is called a concentration gradient.Osmosis is the diffusion of water through a biological membrane. Water molecules move along the concentration gradient from the area of higher water concentration to lower concentration.Facilitated diffusion is when proteins within the cell carry or escort certain materials or substances in or out of the cell.
Which type of transport require energy?
Active transport requires energy in the form of ATP
What determines whether or not a substance will be actively transported through a cell membrane?
Active transport can only occur at intact, closed membranes. Such membranes can envelop very different compartments, like the whole cell, vesicles, the vacuole, the mitochondrial matrix, the inner thylacoid space of the chloroplasts, etc.
Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absen?
Glycolysis is a process in eukaryotic cells that will proceed normally whether oxygen is present or absent. Glycolysis breaks down glucose to produce ATP, the cell's energy currency, and occurs in the cytoplasm. It does not require oxygen and is the first step in both aerobic and anaerobic respiration pathways.
Where in the cell Krebs cycle and electron transport chain occur and whether they are anaerobic or aerobic?
The Krebs cycle (also known as the citric acid cycle) occurs in the mitochondrial matrix and is a key part of cellular respiration, which is aerobic. The electron transport chain takes place in the inner mitochondrial membrane and is also part of aerobic respiration. Both processes require oxygen to generate ATP efficiently.
What energy is required for passive transport?
By definition, passive transport on a cellular level requires no energy other than some sort of gradient, whether of the molecule in question, or another whose movement across the membrane can be linked to the one of interest.
What are the passive transport?
Passive transport processes do not require ATP or energy for transport. Co-transport processes would also not be considered a passive process. -The xylem in plants uses capillary action, a passive process -If a specific channel exists for, let's say, an ion or molecule, then that channel uses passive transport, however, it the channel cannot be "gated" in any way as in voltage-gated Na+ channels or delayed rectifier K+ channels. You can also look at the ascending loop of Henle in the juxtamedullary nephron of the kidney and see passive transport of water molecules -The blood brain barrier also allows passive transport of certain molecules A good way to think of passive transport is whether or not the plasma membrane has "holes" big enough in it to allow for molecules to pass through, provided there are no charge hindrances for that molecule passing through. Or a specific channel is open and letting a molecule in without the expense of ATP (using ATP to make the membrane channel protein does not fall under this category)
Is diffusion passive or active transport?
Diffusion is passive, it happens everywhere whether living things are involved or not. It results from the natural thermal motion of particles.
Does glucose need a transport protein?
Depends if it goes into the cell or out of the cell whether it is passive or active. Yes.
What are two important passive processes for membrane transport?
Diffusion is a method of natural movement of gas molecules from a region of higher concentration to a region of lower concentration. The difference in concentration is called a concentration gradient.Osmosis is the diffusion of water through a biological membrane. Water molecules move along the concentration gradient from the area of higher water concentration to lower concentration.Facilitated diffusion is when proteins within the cell carry or escort certain materials or substances in or out of the cell.
Ions can move through water by what process?
It depends whether by "channels" you mean channel proteins or ion pumps.Substances that move through channel proteins do so by facilitated diffusion. This is diffusion, and therefore is passive (it requires no energy input from the cell). It is called facilitated, because the substances cannot pass through the phospholipid bilayer, and so their passage across the membrane is facilitated by the channels.Ion pumps are different. They move ("pump") a substance against its concentration gradient. This does require a supply of energy, and the cell may supply this by breaking down ATP. The process is called active transport, and can only occur in carrier proteins. Ion pumps are one form of carrier protein.
Which type of transport require energy?
Active transport requires energy in the form of ATP
Do passive transport mechanisms use integral proteins to move substances through membranes?
Yes they may. Passive or Active can both use integral proteins to facilitate transport. When the substances are transported from low to high concentration it requires additional energy (i.e. active transport); while passive transport move molecules from high concentration to low and do not need additional energy (passive transport). Integral proteins are membrane proteins that have transmembrane domain, but whether it will need energy (ATP, photons or conc. gradient) to change from inactive form to active form depends on the substance that it is transporting.
What are five transport mechanism where by metabolites nutrient or ions cross the cell membrane?
There are many forms of membrane and cell transport. These are the basic transport mechanisms in a prokaryotic animal cell. Facilitated Diffusion Osmosis Diffusion Exocytosis (this takes two forms; phagocytosis and pinocytosis depending on whether the cell is "eating" or "drinking") Endocytosis Carrier Molecules/Channel Proteins
What determines whether or not a substance will be actively transported through a cell membrane?
Active transport can only occur at intact, closed membranes. Such membranes can envelop very different compartments, like the whole cell, vesicles, the vacuole, the mitochondrial matrix, the inner thylacoid space of the chloroplasts, etc.
Whether a capacitor is an active or a passive element?
Passive element. An active element is an element that can generate power. Capacitors can't generate power, hence they are passive elements.
How many mm are in a 2 inch circle?
The answer will depend on whether you require the radius, diameter or circumference.The answer will depend on whether you require the radius, diameter or circumference.The answer will depend on whether you require the radius, diameter or circumference.The answer will depend on whether you require the radius, diameter or circumference.
