Glucose can be transported along with sodium across the cell membrane by the process of secondary active transport. Energy in above mentioned transport of glucose across cell membrane is provided by:Select one:a. Adenosine monophosphateb. Adenosine triphosphatec. Glucose concentration differenced. Sodium concentration differenceClear my choice
Question
Glucose can be transported along with sodium across the cell membrane by the process of secondary active transport. Energy in above mentioned transport of glucose across cell membrane is provided by:Select one:a. Adenosine monophosphateb. Adenosine triphosphatec. Glucose concentration differenced. Sodium concentration differenceClear my choice
Solution
The energy for the transport of glucose across the cell membrane in the process of secondary active transport is provided by the sodium concentration difference. This process is known as sodium-glucose cotransport.
Here's a step-by-step explanation:
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Sodium ions are actively transported out of the cell by the sodium-potassium pump, creating a high concentration of sodium ions outside the cell. This process uses energy from Adenosine Triphosphate (ATP).
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This creates a sodium ion concentration gradient, with a higher concentration of sodium ions outside the cell than inside.
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Glucose molecules bind to the sodium-glucose cotransporter protein in the cell membrane.
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Sodium ions moving down their concentration gradient into the cell provide the energy for glucose molecules to be transported into the cell against their concentration gradient.
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Therefore, the correct answer is d. Sodium concentration difference.
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