if glucose is being transported into a muscle cell, would it be moving against the conc. gradient and be active transport or would it be moving down it and be passive?
It would definitely be passive transport. Glucose can cross the cell membrane rather easily (with the help of a transport protein). Your muscles are constantly consuming glucose which makes the concentration of glucose in your muscles lower than the extracellular concentration. Glucose moving from a higher concentration to a lower concentration requires no energy (ATP) so it is passive transport.
if glucose is being transported into a muscle cell, would it be moving against the conc. gradient and be active transport or would it be moving down it and be passive?
Active transport means transporting substances against the concentration gradient; that's why energy is needed. The source is not wrong i.e. there are glucose pumps e.g. the Na-glucose pumps in the epithelial cells of the small intestine. They can be transported either way, basically. Hope this helped to clear things up for you. =)
In addition to size being a key factor in active versus passive transport, the relative concentrations of the specific compounds are also a consideration. Passive transport, or diffusion, is always down the concentration gradient, while active transport is used to pump things "uphill" to a location that has a higher concentration already.
ACTIVE, sugar and glucose enters the cells through their receptors after the Insoline hormone takes them to the cell through the blood veins, Insulin accelerates glucoses' arriving and entrance into cells.
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It would definitely be passive transport. Glucose can cross the cell membrane rather easily (with the help of a transport protein). Your muscles are constantly consuming glucose which makes the concentration of glucose in your muscles lower than the extracellular concentration. Glucose moving from a higher concentration to a lower concentration requires no energy (ATP) so it is passive transport.
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glucose passive or active transport?
if glucose is being transported into a muscle cell, would it be moving against the conc. gradient and be active transport or would it be moving down it and be passive?
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Active transport means transporting substances against the concentration gradient; that's why energy is needed. The source is not wrong i.e. there are glucose pumps e.g. the Na-glucose pumps in the epithelial cells of the small intestine. They can be transported either way, basically. Hope this helped to clear things up for you. =)
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In addition to size being a key factor in active versus passive transport, the relative concentrations of the specific compounds are also a consideration. Passive transport, or diffusion, is always down the concentration gradient, while active transport is used to pump things "uphill" to a location that has a higher concentration already.
ACTIVE, sugar and glucose enters the cells through their receptors after the Insoline hormone takes them to the cell through the blood veins, Insulin accelerates glucoses' arriving and entrance into cells.
very good question .... I hope to know the correct answer ...