Glucose can be moved into cells via an active transport mechanism when the concentration of glucose inside the cell is higher than the concentration of glucose outside of the cell. This active transport mechanism moves glucose and sodium into the cell at the same time. The glucose moves up its gradient and the sodium moves down its gradient. Which of the following statements about this mechanism is accurate?
- To pump glucose up its concentration gradient, sodium is moving down its concentration gradient and the sodium forms an electrochemical gradient in this mechanism.
- The protein that moves the sodium and glucose into the cell is an antiporter.
- To pump glucose up its concentration gradient, sodium is moving down its concentration gradient.
- The sodium forms an electrochemical gradient in this mechanism.
- All of these are true

Question

10-10-2019
Chemistry

contestada

Glucose can be moved into cells via an active transport mechanism when the concentration of glucose inside the cell is higher than the concentration of glucose outside of the cell. This active transport mechanism moves glucose and sodium into the cell at the same time. The glucose moves up its gradient and the sodium moves down its gradient. Which of the following statements about this mechanism is accurate?
- To pump glucose up its concentration gradient, sodium is moving down its concentration gradient and the sodium forms an electrochemical gradient in this mechanism.
- The protein that moves the sodium and glucose into the cell is an antiporter.
- To pump glucose up its concentration gradient, sodium is moving down its concentration gradient.
- The sodium forms an electrochemical gradient in this mechanism.
- All of these are true

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annyksl annyksl · Answer 1 · 2019-10-12T01:51:32+02:00

Answer:

- To pump glucose up its concentration gradient, sodium is moving down its concentration gradient and the sodium forms an electrochemical gradient in this mechanism.

Explanation:

Glucose is transported into most cells against a large concentration gradient, meaning the amount of glucose inside the cell is different outside the cell. The carrier protein responsible for glucose transport has two attachment sites on its outer side, one for sodium and one for glucose.

A special property of the protein responsible for transport is the change in conformation that allows sodium to move inward only after a glucose molecule has been fixed. This mechanism occurs being regulated by the concentration of the two molecules itself, in this case, to increase glucose in the concentration gradient, sodium is decreasing and sodium forms an electrochemical gradient in this mechanism.