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Is osmosis an active transport?
It is a type of passive diffusion, as the water travels along a concentration gradiant. As opposed to active transport, where the substances can pass against a concentration gradiant.
Why do plants use passive transport?
Plants use passive transport because it does not require energy expenditure. Passive transport mechanisms like diffusion and osmosis allow plants to move water, nutrients, and gases across their cell membranes based on concentration gradients. This is an efficient way for plants to absorb essential resources from their environment.
How does the amount of cellular energy used to move a molecule into a cell by active transport compare to the energy used for its movement by passive diffusion?
Active transport requires a significant amount of cellular energy, typically in the form of ATP, to move molecules against their concentration gradient, whereas passive diffusion relies on the natural kinetic energy of molecules and does not require energy input. In essence, active transport is energy-intensive because it actively pumps substances into the cell, while passive diffusion occurs spontaneously and is driven by concentration differences. Consequently, the energy expenditure for active transport is much higher than that for passive diffusion.
Define passive transport?
when you suck to much penis
Give two differences between active transport and passive transport?
Active transport requires energy, passive transport just happens. If there is more of a certain molecule on one side of a membrane than the other, molecules that CAN fit through the membrane will do, so the concentration will even itself out. No work has to be done to achieve this. SO when you breathe in, oxygen just diffuses across from the air into your blood, because there's plenty of it in the air. But if a plant needs to get say magnesium from the soil (which it needs to make chlorophyll) then it is not going to get much by diffusion, because there's not much in the soil and probably more in the plant. It will need to use active transport ie a protein in the cell wall will pick up the substance wanted and flip it into the cell, and this costs the cell some energy.
Compare the contrast pasive and active cell transport process?
Passive transport is when materials move through the cell membrane without using energy. Active transport is when materials move through the cell membrane using the cell's energy. During Active transport a protein called ATP helps the material get through the cell membrane.
Are nutrients absorbed passively or actively in the digestive tract?
Both, depending on the size of the nutrient. Much of absorption works through either endocytosis or transport of small molecules by simple diffusion. Simple diffusion and facilitated diffusion are both types of passive transport and endocytosis requires energy.
What is the role of the electrons in the ETC?
Active transport is moving substance against its gradient so it requires an input of energy to achieve this. One example is Na K ATPase. This is a secondary active transporter that pumps 3x Na out of the cell for 2x K into the cell. There are so much more Na outside the cell and already a lot of K inside the cell so to push the molecules there is an expenditure of ATP to do this.
How do transport proteins move substances across membranes?
Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is a process of passive transport, facilitated by integral proteins. Facilitated diffusion is the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane integral proteins. The facilitated diffusion may occur either across biological membranes or through aqueous compartments of an organism.*This is from Wikipedia.....
Is cl- reabsorption active or passive?
Chloride (Cl-) reabsorption in the kidneys primarily occurs through passive transport mechanisms, such as facilitated diffusion, often coupled with sodium (Na+) reabsorption. However, it can also involve active transport processes in certain segments of the renal tubule. Overall, while much of Cl- reabsorption is passive, the specific mechanisms can vary depending on the location within the nephron.
What is active and passive?
Active is tending to become more severe or wider in scope;like "active tuberculosis" Passive is lacking in energy or will;like "Much benevolence of the passive order may be traced to a disinclination to inflict pain upon oneself"- George Meredith
What is the defition of passive?
lacking in energy or will; "Much benevolence of the passive order may be traced to a disinclination to inflict pain upon oneself"- George Meredithpeacefully resistant in response to injustice; "passive resistance"passive voice: the voice used to indicate that the grammatical subject of the verb is the recipient (not the source) of the action denoted by the verb; "`The ball was thrown by the boy' uses the passive voice"; "`The ball was thrown' is an abbreviated passive"
